fix: not able to load translations

* Translated using Weblate (Japanese)

Currently translated at 98.6% (149 of 151 strings)

Translation: pineapple-pictures/Application
Translate-URL: https://hosted.weblate.org/projects/pineapple-pictures/application/ja/

* Translated using Weblate (Italian)

Currently translated at 100.0% (152 of 152 strings)

Translation: pineapple-pictures/Application
Translate-URL: https://hosted.weblate.org/projects/pineapple-pictures/application/it/

* Translated using Weblate (Spanish)

Currently translated at 100.0% (152 of 152 strings)

Translation: pineapple-pictures/Application
Translate-URL: https://hosted.weblate.org/projects/pineapple-pictures/application/es/

---------

Co-authored-by: mmahhi <mmahhi@users.noreply.hosted.weblate.org>
Co-authored-by: albanobattistella <albano_battistella@hotmail.com>
Co-authored-by: gallegonovato <fran-carro@hotmail.es>

.github/workflows/windows.yml

@@ -1,15 +1,17 @@
 name: Windows CI
 
-on: [push, pull_request]
+on: [push, pull_request, workflow_dispatch]
 
 jobs:
   msvc-qmake-build:
   
     strategy:
       matrix:
-        vs: ['2022']
-        msvc_arch: ['x64']
-        qt_ver: ['6.7.2']
+        include:
+          - qt_ver: '6.8.0'
+            vs: '2022'
+            aqt_arch: 'win64_msvc2022_64'
+            msvc_arch: 'x64'
 
     runs-on: windows-2022
 
@@ -18,7 +20,7 @@ jobs:
     - name: Install Qt
       uses: jurplel/install-qt-action@v4
       with:
-        arch: 'win64_msvc2019_64'
+        arch: ${{ matrix.aqt_arch }}
         version: ${{ matrix.qt_ver }}
         modules: 'qtimageformats'
     - name: Build
@@ -41,9 +43,11 @@ jobs:
   
     strategy:
       matrix:
-        vs: ['2022']
-        msvc_arch: ['x64']
-        qt_ver: ['6.7.2']
+        include:
+          - qt_ver: '6.8.0'
+            vs: '2022'
+            aqt_arch: 'win64_msvc2022_64'
+            msvc_arch: 'x64'
 
     runs-on: windows-2022
 
@@ -52,7 +56,7 @@ jobs:
     - name: Install Qt
       uses: jurplel/install-qt-action@v4
       with:
-        arch: 'win64_msvc2019_64'
+        arch: ${{ matrix.aqt_arch }}
         version: ${{ matrix.qt_ver }}
         modules: 'qtimageformats'
     - name: Build
@@ -67,19 +71,44 @@ jobs:
         :: ------ dep ------
         set CMAKE_PREFIX_PATH=%PWD%/dependencies_bin
         mkdir dependencies_src
+        :: ===== exiv2 =====
         curl -fsSL -o exiv2_bin.zip https://github.com/Exiv2/exiv2/releases/download/v0.28.3/exiv2-0.28.3-2019msvc64.zip
         7z x exiv2_bin.zip -y
         ren .\exiv2-0.28.3-2019msvc64 dependencies_bin
+        :: ===== zlib =====
         curl -fsSL -o zlib_src.zip https://zlib.net/zlib131.zip
         7z x zlib_src.zip -y -o"dependencies_src"
         ren .\dependencies_src\zlib-1.3.1 zlib || goto :error
         cmake ./dependencies_src/zlib -Bbuild_dependencies/zlib -DCMAKE_INSTALL_PREFIX="dependencies_bin" || goto :error
         cmake --build build_dependencies/zlib --config Release --target=install || goto :error
         curl -fsSL -o expat_src.zip https://github.com/libexpat/libexpat/archive/R_2_6_2.zip
+        :: ===== AOM for libavif AVI decoding support =====
+        git clone -q -b v3.10.0 --depth 1 https://aomedia.googlesource.com/aom dependencies_src/aom
+        cmake ./dependencies_src/aom -Bbuild_dependencies/aom -DCMAKE_INSTALL_PREFIX="dependencies_bin" -DENABLE_DOCS=OFF -DBUILD_SHARED_LIBS=ON -DAOM_TARGET_CPU=generic -DENABLE_TESTS=OFF -DENABLE_TESTDATA=OFF -DENABLE_TOOLS=OFF -DENABLE_EXAMPLES=0 || goto :error
+        cmake --build build_dependencies/aom --config Release --target=install || goto :error
+        :: ===== libavif =====
+        curl -fsSL -o libavif-v1_1_1.zip https://github.com/AOMediaCodec/libavif/archive/v1.1.1.zip
+        7z x libavif-v1_1_1.zip -y -o"dependencies_src"
+        ren .\dependencies_src\libavif-1.1.1 libavif || goto :error
+        cmake ./dependencies_src/libavif -Bbuild_dependencies/libavif -DCMAKE_INSTALL_PREFIX="dependencies_bin" -DAVIF_CODEC_AOM=ON -DAVIF_LOCAL_LIBYUV=ON
+        cmake --build build_dependencies/libavif --config Release --target=install || goto :error
+        :: ===== expat =====
         7z x expat_src.zip -y -o"dependencies_src"
         ren .\dependencies_src\libexpat-R_2_6_2 expat || goto :error
         cmake ./dependencies_src/expat/expat -Bbuild_dependencies/expat -DCMAKE_INSTALL_PREFIX="dependencies_bin" || goto :error
         cmake --build build_dependencies/expat --config Release --target=install || goto :error
+        :: ===== ECM =====
+        git clone -q https://invent.kde.org/frameworks/extra-cmake-modules.git dependencies_src/extra-cmake-modules
+        cmake .\dependencies_src\extra-cmake-modules -Bbuild_dependencies/extra-cmake-modules -DCMAKE_INSTALL_PREFIX="dependencies_bin" -DBUILD_TESTING=OFF || goto :error
+        cmake --build build_dependencies/extra-cmake-modules --config Release --target=install || goto :error
+        :: ===== KArchive =====
+        git clone -q https://invent.kde.org/frameworks/karchive.git dependencies_src/karchive
+        cmake .\dependencies_src\karchive -Bbuild_dependencies/karchive -DWITH_LIBZSTD=OFF -DWITH_BZIP2=OFF -DWITH_LIBLZMA=OFF -DCMAKE_INSTALL_PREFIX="dependencies_bin" || goto :error
+        cmake --build build_dependencies/karchive --config Release --target=install || goto :error
+        :: ===== KImageFormats =====
+        git clone -q https://invent.kde.org/frameworks/kimageformats.git dependencies_src/kimageformats
+        cmake .\dependencies_src\kimageformats -Bbuild_dependencies/kimageformats -DKDE_INSTALL_QTPLUGINDIR=%QT_ROOT_DIR%\plugins || goto :error
+        cmake --build build_dependencies/kimageformats --config Release --target=install || goto :error
         :: ------ app ------
         cmake -Bbuild . -DCMAKE_INSTALL_PREFIX="%PWD%\build\"
         cmake --build build --config Release
@@ -88,7 +117,7 @@ jobs:
         windeployqt --verbose=2 --no-quick-import --no-translations --no-opengl-sw --no-system-d3d-compiler --no-system-dxc-compiler --skip-plugin-types tls,networkinformation build\bin\ppic.exe
         robocopy ./dependencies_bin/bin build/bin *.dll
         if ErrorLevel 8 (exit /B 1)
-        copy LICENSE build/bin/
+        copy LICENSE build\bin
         exit /B 0
     - uses: actions/upload-artifact@v4
       with:

CMakeLists.txt

@@ -4,7 +4,7 @@
 
 cmake_minimum_required (VERSION 3.9.5)
 
-project (pineapple-pictures)
+project(pineapple-pictures VERSION 0.8.2.1) # don't forget to update NEWS file and AppStream metadata.
 
 include (GNUInstallDirs)
 include (FeatureSummary)
@@ -179,6 +179,7 @@ macro (ppic_set_version_via_describe _describe_long)
 endmacro ()
 
 # Version setup
+target_compile_definitions(${EXE_NAME} PRIVATE PPIC_VERSION_STRING="${CMAKE_PROJECT_VERSION}")
 if (EXISTS "${CMAKE_SOURCE_DIR}/.git")
     find_package(Git)
     set_package_properties(Git PROPERTIES TYPE OPTIONAL PURPOSE "Determine exact build version.")

NEWS

@@ -1,3 +1,30 @@
+Version 0.8.2.1
+~~~~~~~~~~~~~
+Released: 2024-10-27
+
+Bugfixes:
+ * Cannot load translations caused by a change in 0.8.2
+
+Version 0.8.2
+~~~~~~~~~~~~~
+Released: 2024-10-26
+
+Features:
+ * New option to allow use light-color checkerboard by default
+
+Contributors:
+ albanobattistella, mmahhi, gallegonovato
+
+Version 0.8.1
+~~~~~~~~~~~~~
+Released: 2024-08-25
+
+Features:
+ * New command line option to list all supported formats
+
+Contributors:
+ albanobattistella, mmahhi, ovl-1, gallegonovato, Oğuz Ersen
+
 Version 0.8.0
 ~~~~~~~~~~~~~
 Released: 2024-06-29

app/aboutdialog.cpp

@@ -50,9 +50,13 @@ AboutDialog::AboutDialog(QWidget *parent)
     const QStringList aboutStr {
         QStringLiteral("<center><img width='128' height='128' src=':/icons/app-icon.svg'/><br/>"),
         qApp->applicationDisplayName(),
+        (QStringLiteral("<br/>") + tr("Version: %1").arg(
 #ifdef GIT_DESCRIBE_VERSION_STRING
-        (QStringLiteral("<br/>") + tr("Version: %1").arg(GIT_DESCRIBE_VERSION_STRING)),
+            GIT_DESCRIBE_VERSION_STRING
+#else
+            qApp->applicationVersion()
 #endif // GIT_DESCRIBE_VERSION_STRING
+        )),
         QStringLiteral("<hr/>"),
         tr("Copyright (c) %1 %2", "%1 is year, %2 is the name of copyright holder(s)")
             .arg(QStringLiteral("2024"), QStringLiteral("<a href='https://github.com/BLumia'>@BLumia</a>")),

app/graphicsview.cpp

@@ -5,6 +5,7 @@
 #include "graphicsview.h"
 
 #include "graphicsscene.h"
+#include "settings.h"
 
 #include <QDebug>
 #include <QMouseEvent>
@@ -338,16 +339,16 @@ bool GraphicsView::shouldIgnoreMousePressMoveEvent(const QMouseEvent *event) con
 void GraphicsView::setCheckerboardEnabled(bool enabled, bool invertColor)
 {
     m_checkerboardEnabled = enabled;
-    m_isLastCheckerboardColorInverted = invertColor;
+    bool isLightCheckerboard = Settings::instance()->useLightCheckerboard() ^ invertColor;
     if (m_checkerboardEnabled) {
         // Prepare background check-board pattern
         QPixmap tilePixmap(0x20, 0x20);
-        tilePixmap.fill(invertColor ? QColor(220, 220, 220, 170) : QColor(35, 35, 35, 170));
+        tilePixmap.fill(isLightCheckerboard ? QColor(220, 220, 220, 170) : QColor(35, 35, 35, 170));
         QPainter tilePainter(&tilePixmap);
         constexpr QColor color(45, 45, 45, 170);
         constexpr QColor invertedColor(210, 210, 210, 170);
-        tilePainter.fillRect(0, 0, 0x10, 0x10, invertColor ? invertedColor : color);
-        tilePainter.fillRect(0x10, 0x10, 0x10, 0x10, invertColor ? invertedColor : color);
+        tilePainter.fillRect(0, 0, 0x10, 0x10, isLightCheckerboard ? invertedColor : color);
+        tilePainter.fillRect(0x10, 0x10, 0x10, 0x10, isLightCheckerboard ? invertedColor : color);
         tilePainter.end();
 
         setBackgroundBrush(tilePixmap);

app/graphicsview.h

@@ -70,7 +70,7 @@ private:
     bool m_enableFitInView = false;
     bool m_avoidResetTransform = false;
     bool m_checkerboardEnabled = false;
-    bool m_isLastCheckerboardColorInverted = false;
+    bool m_useLightCheckerboard = false;
 };
 
 #endif // GRAPHICSVIEW_H

app/main.cpp

@@ -20,6 +20,8 @@
 
 int main(int argc, char *argv[])
 {
+    QCoreApplication::setApplicationName("Pineapple Pictures");
+    QCoreApplication::setApplicationVersion(PPIC_VERSION_STRING);
     QGuiApplication::setHighDpiScaleFactorRoundingPolicy(Settings::instance()->hiDpiScaleFactorBehavior());
 
     QApplication a(argc, argv);
@@ -35,10 +37,10 @@ int main(int argc, char *argv[])
     qmDir = QT_STRINGIFY(QM_FILE_INSTALL_DIR);
 #endif
     if (translator.load(QLocale(), QLatin1String("PineapplePictures"), QLatin1String("_"), qmDir)) {
-        a.installTranslator(&translator);
+        QCoreApplication::installTranslator(&translator);
     }
-    a.setApplicationName("Pineapple Pictures");
-    a.setApplicationDisplayName(QCoreApplication::translate("main", "Pineapple Pictures"));
+
+    QGuiApplication::setApplicationDisplayName(QCoreApplication::translate("main", "Pineapple Pictures"));
 
     // commandline options
     QCommandLineOption supportedImageFormats(QStringLiteral("supported-image-formats"), QCoreApplication::translate("main", "List supported image format suffixes, and quit program."));
@@ -66,5 +68,5 @@ int main(int argc, char *argv[])
 
     w.initWindowSize();
 
-    return a.exec();
+    return QApplication::exec();
 }

app/settings.cpp

@@ -47,6 +47,11 @@ bool Settings::stayOnTop()
     return m_qsettings->value("stay_on_top", true).toBool();
 }
 
+bool Settings::useLightCheckerboard()
+{
+    return m_qsettings->value("use_light_checkerboard", false).toBool();
+}
+
 Settings::DoubleClickBehavior Settings::doubleClickBehavior() const
 {
     QString result = m_qsettings->value("double_click_behavior", "Close").toString();
@@ -81,6 +86,12 @@ void Settings::setStayOnTop(bool on)
     m_qsettings->sync();
 }
 
+void Settings::setUseLightCheckerboard(bool light)
+{
+    m_qsettings->setValue("use_light_checkerboard", light);
+    m_qsettings->sync();
+}
+
 void Settings::setDoubleClickBehavior(DoubleClickBehavior dcb)
 {
     m_qsettings->setValue("double_click_behavior", QEnumHelper::toString(dcb));
@@ -138,7 +149,7 @@ Settings::Settings()
 #endif // defined(FLAG_PORTABLE_MODE_SUPPORT) && defined(Q_OS_WIN)
 
     if (configPath.isEmpty()) {
-        // %LOCALAPPDATA%\<APPNAME> under Windows, ~/.config/<APPNAME> under Linux.
+        // Should be %LOCALAPPDATA%\<APPNAME> under Windows, ~/.config/<APPNAME> under Linux.
         configPath = QStandardPaths::writableLocation(QStandardPaths::AppConfigLocation);
     }
 

app/settings.h

@@ -33,12 +33,14 @@ public:
     static Settings *instance();
 
     bool stayOnTop();
+    bool useLightCheckerboard();
     DoubleClickBehavior doubleClickBehavior() const;
     MouseWheelBehavior mouseWheelBehavior() const;
     WindowSizeBehavior initWindowSizeBehavior() const;
     Qt::HighDpiScaleFactorRoundingPolicy hiDpiScaleFactorBehavior() const;
 
     void setStayOnTop(bool on);
+    void setUseLightCheckerboard(bool light);
     void setDoubleClickBehavior(DoubleClickBehavior dcb);
     void setMouseWheelBehavior(MouseWheelBehavior mwb);
     void setInitWindowSizeBehavior(WindowSizeBehavior wsb);

app/settingsdialog.cpp

@@ -14,6 +14,7 @@
 SettingsDialog::SettingsDialog(QWidget *parent)
     : QDialog(parent)
     , m_stayOnTop(new QCheckBox)
+    , m_useLightCheckerboard(new QCheckBox)
     , m_doubleClickBehavior(new QComboBox)
     , m_mouseWheelBehavior(new QComboBox)
     , m_initWindowSizeBehavior(new QComboBox)
@@ -67,12 +68,14 @@ SettingsDialog::SettingsDialog(QWidget *parent)
     }
 
     settingsForm->addRow(tr("Stay on top when start-up"), m_stayOnTop);
+    settingsForm->addRow(tr("Use light-color checkerboard"), m_useLightCheckerboard);
     settingsForm->addRow(tr("Double-click behavior"), m_doubleClickBehavior);
     settingsForm->addRow(tr("Mouse wheel behavior"), m_mouseWheelBehavior);
     settingsForm->addRow(tr("Default window size"), m_initWindowSizeBehavior);
     settingsForm->addRow(tr("HiDPI scale factor rounding policy"), m_hiDpiRoundingPolicyBehavior);
 
     m_stayOnTop->setChecked(Settings::instance()->stayOnTop());
+    m_useLightCheckerboard->setChecked(Settings::instance()->useLightCheckerboard());
     m_doubleClickBehavior->setModel(new QStringListModel(dcbDropDown));
     Settings::DoubleClickBehavior dcb = Settings::instance()->doubleClickBehavior();
     m_doubleClickBehavior->setCurrentIndex(static_cast<int>(dcb));
@@ -95,6 +98,10 @@ SettingsDialog::SettingsDialog(QWidget *parent)
         Settings::instance()->setStayOnTop(state == Qt::Checked);
     });
 
+    connect(m_useLightCheckerboard, &QCheckBox::stateChanged, this, [ = ](int state){
+        Settings::instance()->setUseLightCheckerboard(state == Qt::Checked);
+    });
+
     connect(m_doubleClickBehavior, QOverload<int>::of(&QComboBox::currentIndexChanged), this, [ = ](int index){
         Settings::instance()->setDoubleClickBehavior(_dc_options.at(index).first);
     });

app/settingsdialog.h

@@ -23,6 +23,7 @@ public slots:
 
 private:
     QCheckBox * m_stayOnTop = nullptr;
+    QCheckBox * m_useLightCheckerboard = nullptr;
     QComboBox * m_doubleClickBehavior = nullptr;
     QComboBox * m_mouseWheelBehavior = nullptr;
     QComboBox * m_initWindowSizeBehavior = nullptr;

app/translations/PineapplePictures.ts

@@ -44,129 +44,129 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="54"/>
+        <location filename="../aboutdialog.cpp" line="53"/>
         <source>Version: %1</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="60"/>
+        <location filename="../aboutdialog.cpp" line="64"/>
         <source>Logo designed by %1</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="62"/>
+        <location filename="../aboutdialog.cpp" line="66"/>
         <source>Built with Qt %1 (%2)</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="63"/>
+        <location filename="../aboutdialog.cpp" line="67"/>
         <source>Source code</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="73"/>
+        <location filename="../aboutdialog.cpp" line="77"/>
         <source>Contributors</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="75"/>
+        <location filename="../aboutdialog.cpp" line="79"/>
         <source>List of contributors on GitHub</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="76"/>
+        <location filename="../aboutdialog.cpp" line="80"/>
         <source>Thanks to all people who contributed to this project.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="80"/>
+        <location filename="../aboutdialog.cpp" line="84"/>
         <source>Translators</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="81"/>
+        <location filename="../aboutdialog.cpp" line="85"/>
         <source>I would like to thank the following people who volunteered to translate this application.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="125"/>
+        <location filename="../aboutdialog.cpp" line="129"/>
         <source>%1 is built on the following free software libraries:</source>
         <comment>Free as in freedom</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="149"/>
+        <location filename="../aboutdialog.cpp" line="153"/>
         <source>&amp;Special Thanks</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="151"/>
+        <location filename="../aboutdialog.cpp" line="155"/>
         <source>&amp;Third-party Libraries</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="87"/>
+        <location filename="../aboutdialog.cpp" line="91"/>
         <source>Your Rights</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="57"/>
+        <location filename="../aboutdialog.cpp" line="61"/>
         <source>Copyright (c) %1 %2</source>
         <comment>%1 is year, %2 is the name of copyright holder(s)</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="89"/>
+        <location filename="../aboutdialog.cpp" line="93"/>
         <source>%1 is released under the MIT License.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="90"/>
+        <location filename="../aboutdialog.cpp" line="94"/>
         <source>This license grants people a number of freedoms:</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="91"/>
+        <location filename="../aboutdialog.cpp" line="95"/>
         <source>You are free to use %1, for any purpose</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="92"/>
+        <location filename="../aboutdialog.cpp" line="96"/>
         <source>You are free to distribute %1</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="93"/>
+        <location filename="../aboutdialog.cpp" line="97"/>
         <source>You can study how %1 works and change it</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="94"/>
+        <location filename="../aboutdialog.cpp" line="98"/>
         <source>You can distribute changed versions of %1</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="96"/>
+        <location filename="../aboutdialog.cpp" line="100"/>
         <source>The MIT license guarantees you this freedom. Nobody is ever permitted to take it away.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="124"/>
+        <location filename="../aboutdialog.cpp" line="128"/>
         <source>Third-party Libraries used by %1</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="147"/>
+        <location filename="../aboutdialog.cpp" line="151"/>
         <source>&amp;Help</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="148"/>
+        <location filename="../aboutdialog.cpp" line="152"/>
         <source>&amp;About</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="150"/>
+        <location filename="../aboutdialog.cpp" line="154"/>
         <source>&amp;License</source>
         <translation type="unfinished"></translation>
     </message>
@@ -183,13 +183,13 @@
 <context>
     <name>GraphicsView</name>
     <message>
-        <location filename="../graphicsview.cpp" line="51"/>
+        <location filename="../graphicsview.cpp" line="52"/>
         <source>File is not a valid image</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="55"/>
-        <location filename="../graphicsview.cpp" line="59"/>
+        <location filename="../graphicsview.cpp" line="56"/>
+        <location filename="../graphicsview.cpp" line="60"/>
         <source>Image data is invalid or currently unsupported</source>
         <translation type="unfinished"></translation>
     </message>
@@ -695,91 +695,96 @@
 <context>
     <name>SettingsDialog</name>
     <message>
-        <location filename="../settingsdialog.cpp" line="22"/>
+        <location filename="../settingsdialog.cpp" line="23"/>
         <source>Settings</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="27"/>
+        <location filename="../settingsdialog.cpp" line="28"/>
         <source>Do nothing</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="28"/>
+        <location filename="../settingsdialog.cpp" line="29"/>
         <source>Close the window</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="29"/>
+        <location filename="../settingsdialog.cpp" line="30"/>
         <source>Toggle maximize</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="33"/>
+        <location filename="../settingsdialog.cpp" line="34"/>
         <source>Zoom in and out</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="34"/>
+        <location filename="../settingsdialog.cpp" line="35"/>
         <source>View next or previous item</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="38"/>
+        <location filename="../settingsdialog.cpp" line="39"/>
         <source>Auto size</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="39"/>
+        <location filename="../settingsdialog.cpp" line="40"/>
         <source>Maximized</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="43"/>
+        <location filename="../settingsdialog.cpp" line="44"/>
         <source>Round (Integer scaling)</source>
         <comment>This option means round up for .5 and above</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="44"/>
+        <location filename="../settingsdialog.cpp" line="45"/>
         <source>Ceil (Integer scaling)</source>
         <comment>This option means always round up</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="45"/>
+        <location filename="../settingsdialog.cpp" line="46"/>
         <source>Floor (Integer scaling)</source>
         <comment>This option means always round down</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="46"/>
+        <location filename="../settingsdialog.cpp" line="47"/>
         <source>Follow system (Fractional scaling)</source>
         <comment>This option means don&apos;t round</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="69"/>
+        <location filename="../settingsdialog.cpp" line="70"/>
         <source>Stay on top when start-up</source>
         <translation type="unfinished"></translation>
     </message>
-    <message>
-        <location filename="../settingsdialog.cpp" line="70"/>
-        <source>Double-click behavior</source>
-        <translation type="unfinished"></translation>
-    </message>
     <message>
         <location filename="../settingsdialog.cpp" line="71"/>
-        <source>Mouse wheel behavior</source>
+        <source>Use light-color checkerboard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../settingsdialog.cpp" line="72"/>
-        <source>Default window size</source>
+        <source>Double-click behavior</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../settingsdialog.cpp" line="73"/>
+        <source>Mouse wheel behavior</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../settingsdialog.cpp" line="74"/>
+        <source>Default window size</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../settingsdialog.cpp" line="75"/>
         <source>HiDPI scale factor rounding policy</source>
         <translation type="unfinished"></translation>
     </message>
@@ -792,12 +797,12 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="44"/>
+        <location filename="../main.cpp" line="45"/>
         <source>List supported image format suffixes, and quit program.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="48"/>
+        <location filename="../main.cpp" line="49"/>
         <source>File list.</source>
         <translation type="unfinished"></translation>
     </message>

app/translations/PineapplePictures_ca.ts

@@ -44,129 +44,129 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="54"/>
+        <location filename="../aboutdialog.cpp" line="53"/>
         <source>Version: %1</source>
         <translation>Versió: %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="60"/>
+        <location filename="../aboutdialog.cpp" line="64"/>
         <source>Logo designed by %1</source>
         <translation>Logotip dissenyat por %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="62"/>
+        <location filename="../aboutdialog.cpp" line="66"/>
         <source>Built with Qt %1 (%2)</source>
         <translation>Creat amb Qt %1 (%2)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="63"/>
+        <location filename="../aboutdialog.cpp" line="67"/>
         <source>Source code</source>
         <translation>Codi font</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="73"/>
+        <location filename="../aboutdialog.cpp" line="77"/>
         <source>Contributors</source>
         <translation>Col·laboradors</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="75"/>
+        <location filename="../aboutdialog.cpp" line="79"/>
         <source>List of contributors on GitHub</source>
         <translation>Llista de col·laboradors al GitHub</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="76"/>
+        <location filename="../aboutdialog.cpp" line="80"/>
         <source>Thanks to all people who contributed to this project.</source>
         <translation>Gràcies a totes les persones que han col·laborat en aquest projecte.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="80"/>
+        <location filename="../aboutdialog.cpp" line="84"/>
         <source>Translators</source>
         <translation>Traductors</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="81"/>
+        <location filename="../aboutdialog.cpp" line="85"/>
         <source>I would like to thank the following people who volunteered to translate this application.</source>
         <translation>M&apos;agradaria donar les gràcies a les persones següents per oferir-se a traduir aquesta aplicació.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="125"/>
+        <location filename="../aboutdialog.cpp" line="129"/>
         <source>%1 is built on the following free software libraries:</source>
         <comment>Free as in freedom</comment>
         <translation>%1 està construït sobre les biblioteques de programari lliure següents:</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="149"/>
+        <location filename="../aboutdialog.cpp" line="153"/>
         <source>&amp;Special Thanks</source>
         <translation>&amp;Especial agraïment</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="151"/>
+        <location filename="../aboutdialog.cpp" line="155"/>
         <source>&amp;Third-party Libraries</source>
         <translation>&amp;Biblioteques de tercers</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="87"/>
+        <location filename="../aboutdialog.cpp" line="91"/>
         <source>Your Rights</source>
         <translation>Els vostres drets</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="57"/>
+        <location filename="../aboutdialog.cpp" line="61"/>
         <source>Copyright (c) %1 %2</source>
         <comment>%1 is year, %2 is the name of copyright holder(s)</comment>
         <translation>Copyright (c) %1 %2</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="89"/>
+        <location filename="../aboutdialog.cpp" line="93"/>
         <source>%1 is released under the MIT License.</source>
         <translation>%1 es publica sota la llicència MIT.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="90"/>
+        <location filename="../aboutdialog.cpp" line="94"/>
         <source>This license grants people a number of freedoms:</source>
         <translation>Aquesta llicència atorga a les persones diverses llibertats:</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="91"/>
+        <location filename="../aboutdialog.cpp" line="95"/>
         <source>You are free to use %1, for any purpose</source>
         <translation>Sou lliure de fer servir %1 per a qualsevol propòsit</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="92"/>
+        <location filename="../aboutdialog.cpp" line="96"/>
         <source>You are free to distribute %1</source>
         <translation>Sou lliure de distribuir %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="93"/>
+        <location filename="../aboutdialog.cpp" line="97"/>
         <source>You can study how %1 works and change it</source>
         <translation>Podeu estudiar com funciona %1 i modificar-lo</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="94"/>
+        <location filename="../aboutdialog.cpp" line="98"/>
         <source>You can distribute changed versions of %1</source>
         <translation>Podeu distribuir les versions modificades de %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="96"/>
+        <location filename="../aboutdialog.cpp" line="100"/>
         <source>The MIT license guarantees you this freedom. Nobody is ever permitted to take it away.</source>
         <translation>La llicència del MIT us garanteix aquesta llibertat. No és permès que ningú us la tregui.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="124"/>
+        <location filename="../aboutdialog.cpp" line="128"/>
         <source>Third-party Libraries used by %1</source>
         <translation>Biblioteques de tercers que fa servir %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="147"/>
+        <location filename="../aboutdialog.cpp" line="151"/>
         <source>&amp;Help</source>
         <translation>Aj&amp;uda</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="148"/>
+        <location filename="../aboutdialog.cpp" line="152"/>
         <source>&amp;About</source>
         <translation>&amp;Quant a</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="150"/>
+        <location filename="../aboutdialog.cpp" line="154"/>
         <source>&amp;License</source>
         <translation>&amp;Llicència</translation>
     </message>
@@ -187,13 +187,13 @@
         <translation type="vanished">La llista d&apos;ubicacions de fitxer és buida</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="51"/>
+        <location filename="../graphicsview.cpp" line="52"/>
         <source>File is not a valid image</source>
         <translation>El fitxer no és una imatge vàlida</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="55"/>
-        <location filename="../graphicsview.cpp" line="59"/>
+        <location filename="../graphicsview.cpp" line="56"/>
+        <location filename="../graphicsview.cpp" line="60"/>
         <source>Image data is invalid or currently unsupported</source>
         <translation>Les dades de la imatge no són vàlides o no són compatibles</translation>
     </message>
@@ -707,91 +707,96 @@
 <context>
     <name>SettingsDialog</name>
     <message>
-        <location filename="../settingsdialog.cpp" line="22"/>
+        <location filename="../settingsdialog.cpp" line="23"/>
         <source>Settings</source>
         <translation>Paràmetres</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="27"/>
+        <location filename="../settingsdialog.cpp" line="28"/>
         <source>Do nothing</source>
         <translation>No facis res</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="28"/>
+        <location filename="../settingsdialog.cpp" line="29"/>
         <source>Close the window</source>
         <translation>Tanca la finestra</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="29"/>
+        <location filename="../settingsdialog.cpp" line="30"/>
         <source>Toggle maximize</source>
         <translation>Commuta la maximització</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="33"/>
+        <location filename="../settingsdialog.cpp" line="34"/>
         <source>Zoom in and out</source>
         <translation>Amplia i redueix</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="34"/>
+        <location filename="../settingsdialog.cpp" line="35"/>
         <source>View next or previous item</source>
         <translation>Mostra l&apos;element següent o l&apos;anterior</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="38"/>
+        <location filename="../settingsdialog.cpp" line="39"/>
         <source>Auto size</source>
         <translation>Mida automàtica</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="39"/>
+        <location filename="../settingsdialog.cpp" line="40"/>
         <source>Maximized</source>
         <translation>Maximitza</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="43"/>
+        <location filename="../settingsdialog.cpp" line="44"/>
         <source>Round (Integer scaling)</source>
         <comment>This option means round up for .5 and above</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="44"/>
+        <location filename="../settingsdialog.cpp" line="45"/>
         <source>Ceil (Integer scaling)</source>
         <comment>This option means always round up</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="45"/>
+        <location filename="../settingsdialog.cpp" line="46"/>
         <source>Floor (Integer scaling)</source>
         <comment>This option means always round down</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="46"/>
+        <location filename="../settingsdialog.cpp" line="47"/>
         <source>Follow system (Fractional scaling)</source>
         <comment>This option means don&apos;t round</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="69"/>
+        <location filename="../settingsdialog.cpp" line="70"/>
         <source>Stay on top when start-up</source>
         <translation>Mantingues a sobre a l&apos;inici</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="70"/>
+        <location filename="../settingsdialog.cpp" line="71"/>
+        <source>Use light-color checkerboard</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../settingsdialog.cpp" line="72"/>
         <source>Double-click behavior</source>
         <translation>Comportament del doble clic</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="71"/>
+        <location filename="../settingsdialog.cpp" line="73"/>
         <source>Mouse wheel behavior</source>
         <translation>Comportament de la roda del ratolí</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="72"/>
+        <location filename="../settingsdialog.cpp" line="74"/>
         <source>Default window size</source>
         <translation>Mida de la finestra per defecte</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="73"/>
+        <location filename="../settingsdialog.cpp" line="75"/>
         <source>HiDPI scale factor rounding policy</source>
         <translation type="unfinished"></translation>
     </message>
@@ -804,12 +809,12 @@
         <translation>Pineapple Pictures</translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="44"/>
+        <location filename="../main.cpp" line="45"/>
         <source>List supported image format suffixes, and quit program.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="48"/>
+        <location filename="../main.cpp" line="49"/>
         <source>File list.</source>
         <translation>Llista de fitxers.</translation>
     </message>

app/translations/PineapplePictures_de.ts

@@ -39,7 +39,7 @@
         <translation>Es vermeiden, das Fenster versehentlich zu schließen. (z.B. durch Doppelklick auf das Fenster)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="54"/>
+        <location filename="../aboutdialog.cpp" line="53"/>
         <source>Version: %1</source>
         <translation>Version: %1</translation>
     </message>
@@ -48,63 +48,63 @@
         <translation type="vanished">Copyright © 2020 %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="60"/>
+        <location filename="../aboutdialog.cpp" line="64"/>
         <source>Logo designed by %1</source>
         <translation>Logo entworfen von %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="62"/>
+        <location filename="../aboutdialog.cpp" line="66"/>
         <source>Built with Qt %1 (%2)</source>
         <translation>Gemacht mit Qt %1 (%2)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="63"/>
+        <location filename="../aboutdialog.cpp" line="67"/>
         <source>Source code</source>
         <translation>Quellcode</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="73"/>
+        <location filename="../aboutdialog.cpp" line="77"/>
         <source>Contributors</source>
         <translation>Mitwirkenden</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="75"/>
+        <location filename="../aboutdialog.cpp" line="79"/>
         <source>List of contributors on GitHub</source>
         <translation>Liste der Mitwirkenden auf GitHub</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="76"/>
+        <location filename="../aboutdialog.cpp" line="80"/>
         <source>Thanks to all people who contributed to this project.</source>
         <translation>Vielen Dank an alle, die zu diesem Projekt beigetragen haben.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="80"/>
+        <location filename="../aboutdialog.cpp" line="84"/>
         <source>Translators</source>
         <translation>Übersetzer</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="81"/>
+        <location filename="../aboutdialog.cpp" line="85"/>
         <source>I would like to thank the following people who volunteered to translate this application.</source>
         <translation>Ich möchte den folgenden Personen danken, die sich freiwillig zur Übersetzung dieser Anwendung gemeldet haben.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="125"/>
+        <location filename="../aboutdialog.cpp" line="129"/>
         <source>%1 is built on the following free software libraries:</source>
         <comment>Free as in freedom</comment>
         <translation>%1 basiert auf den folgenden freien Softwarebibliotheken:</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="149"/>
+        <location filename="../aboutdialog.cpp" line="153"/>
         <source>&amp;Special Thanks</source>
         <translation>&amp;Besonderer Dank</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="151"/>
+        <location filename="../aboutdialog.cpp" line="155"/>
         <source>&amp;Third-party Libraries</source>
         <translation>&amp;Bibliotheken von Drittanbietern</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="87"/>
+        <location filename="../aboutdialog.cpp" line="91"/>
         <source>Your Rights</source>
         <translation>Ihre Rechte</translation>
     </message>
@@ -114,63 +114,63 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="57"/>
+        <location filename="../aboutdialog.cpp" line="61"/>
         <source>Copyright (c) %1 %2</source>
         <comment>%1 is year, %2 is the name of copyright holder(s)</comment>
         <translation>Copyright (c) %1 %2</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="89"/>
+        <location filename="../aboutdialog.cpp" line="93"/>
         <source>%1 is released under the MIT License.</source>
         <translation>%1 wird unter der MIT-Lizenz veröffentlicht.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="90"/>
+        <location filename="../aboutdialog.cpp" line="94"/>
         <source>This license grants people a number of freedoms:</source>
         <translation>Diese Lizenz gewährt Menschen eine Reihe von Freiheiten:</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="91"/>
+        <location filename="../aboutdialog.cpp" line="95"/>
         <source>You are free to use %1, for any purpose</source>
         <translation>Sie dürfen %1 für jeden Zweck verwenden</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="92"/>
+        <location filename="../aboutdialog.cpp" line="96"/>
         <source>You are free to distribute %1</source>
         <translation>Sie dürfen %1 verteilen</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="93"/>
+        <location filename="../aboutdialog.cpp" line="97"/>
         <source>You can study how %1 works and change it</source>
         <translation>Sie können untersuchen, wie %1 funktioniert, und es ändern</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="94"/>
+        <location filename="../aboutdialog.cpp" line="98"/>
         <source>You can distribute changed versions of %1</source>
         <translation>Sie können geänderte Versionen von %1 verteilen</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="96"/>
+        <location filename="../aboutdialog.cpp" line="100"/>
         <source>The MIT license guarantees you this freedom. Nobody is ever permitted to take it away.</source>
         <translation>Die MIT-Lizenz garantiert Ihnen diese Freiheit. Niemand darf es jemals wegnehmen.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="124"/>
+        <location filename="../aboutdialog.cpp" line="128"/>
         <source>Third-party Libraries used by %1</source>
         <translation>Von %1 verwendete Bibliotheken von Drittanbietern</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="147"/>
+        <location filename="../aboutdialog.cpp" line="151"/>
         <source>&amp;Help</source>
         <translation>&amp;Hilfe</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="148"/>
+        <location filename="../aboutdialog.cpp" line="152"/>
         <source>&amp;About</source>
         <translation>&amp;Über</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="150"/>
+        <location filename="../aboutdialog.cpp" line="154"/>
         <source>&amp;License</source>
         <translation>&amp;Lizenz</translation>
     </message>
@@ -191,13 +191,13 @@
         <translation type="vanished">Die Datei-URL-Liste ist leer</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="51"/>
+        <location filename="../graphicsview.cpp" line="52"/>
         <source>File is not a valid image</source>
         <translation>Datei ist kein gültiges Bild</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="55"/>
-        <location filename="../graphicsview.cpp" line="59"/>
+        <location filename="../graphicsview.cpp" line="56"/>
+        <location filename="../graphicsview.cpp" line="60"/>
         <source>Image data is invalid or currently unsupported</source>
         <translation>Bilddaten sind ungültig oder werden derzeit nicht unterstützt</translation>
     </message>
@@ -711,91 +711,96 @@
 <context>
     <name>SettingsDialog</name>
     <message>
-        <location filename="../settingsdialog.cpp" line="22"/>
+        <location filename="../settingsdialog.cpp" line="23"/>
         <source>Settings</source>
         <translation>Einstellungen</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="27"/>
+        <location filename="../settingsdialog.cpp" line="28"/>
         <source>Do nothing</source>
         <translation>Nichts tun</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="28"/>
+        <location filename="../settingsdialog.cpp" line="29"/>
         <source>Close the window</source>
         <translation>Fenster schließen</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="29"/>
+        <location filename="../settingsdialog.cpp" line="30"/>
         <source>Toggle maximize</source>
         <translation>Maximieren umschalten</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="33"/>
+        <location filename="../settingsdialog.cpp" line="34"/>
         <source>Zoom in and out</source>
         <translation>Hinein- und Hinauszoomen</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="34"/>
+        <location filename="../settingsdialog.cpp" line="35"/>
         <source>View next or previous item</source>
         <translation>Zeige nächstes oder vorheriges Element</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="38"/>
+        <location filename="../settingsdialog.cpp" line="39"/>
         <source>Auto size</source>
         <translation>Automatische Größe</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="39"/>
+        <location filename="../settingsdialog.cpp" line="40"/>
         <source>Maximized</source>
         <translation>Maximiert</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="43"/>
+        <location filename="../settingsdialog.cpp" line="44"/>
         <source>Round (Integer scaling)</source>
         <comment>This option means round up for .5 and above</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="44"/>
+        <location filename="../settingsdialog.cpp" line="45"/>
         <source>Ceil (Integer scaling)</source>
         <comment>This option means always round up</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="45"/>
+        <location filename="../settingsdialog.cpp" line="46"/>
         <source>Floor (Integer scaling)</source>
         <comment>This option means always round down</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="46"/>
+        <location filename="../settingsdialog.cpp" line="47"/>
         <source>Follow system (Fractional scaling)</source>
         <comment>This option means don&apos;t round</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="69"/>
+        <location filename="../settingsdialog.cpp" line="70"/>
         <source>Stay on top when start-up</source>
         <translation>Beim Start oben bleiben</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="70"/>
+        <location filename="../settingsdialog.cpp" line="71"/>
+        <source>Use light-color checkerboard</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../settingsdialog.cpp" line="72"/>
         <source>Double-click behavior</source>
         <translation>Doppelklickverhalten</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="71"/>
+        <location filename="../settingsdialog.cpp" line="73"/>
         <source>Mouse wheel behavior</source>
         <translation>Mausradverhalten</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="72"/>
+        <location filename="../settingsdialog.cpp" line="74"/>
         <source>Default window size</source>
         <translation>Standard-Fenstergröße</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="73"/>
+        <location filename="../settingsdialog.cpp" line="75"/>
         <source>HiDPI scale factor rounding policy</source>
         <translation type="unfinished"></translation>
     </message>
@@ -808,12 +813,12 @@
         <translation>Pineapple Pictures</translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="44"/>
+        <location filename="../main.cpp" line="45"/>
         <source>List supported image format suffixes, and quit program.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="48"/>
+        <location filename="../main.cpp" line="49"/>
         <source>File list.</source>
         <translation>Dateiliste.</translation>
     </message>

app/translations/PineapplePictures_es.ts

@@ -39,7 +39,7 @@
         <translation>Evita que se cierre la ventana accidentalmente (por ejemplo, al hacer doble clic en la ventana)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="54"/>
+        <location filename="../aboutdialog.cpp" line="53"/>
         <source>Version: %1</source>
         <translation>Versión: %1</translation>
     </message>
@@ -48,63 +48,63 @@
         <translation type="vanished">Derechos reservados (c) 2020 %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="60"/>
+        <location filename="../aboutdialog.cpp" line="64"/>
         <source>Logo designed by %1</source>
         <translation>Logo diseñado por %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="62"/>
+        <location filename="../aboutdialog.cpp" line="66"/>
         <source>Built with Qt %1 (%2)</source>
         <translation>Creado con Qt %1 (%2)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="63"/>
+        <location filename="../aboutdialog.cpp" line="67"/>
         <source>Source code</source>
         <translation>Código fuente</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="73"/>
+        <location filename="../aboutdialog.cpp" line="77"/>
         <source>Contributors</source>
         <translation>Colaboradores</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="75"/>
+        <location filename="../aboutdialog.cpp" line="79"/>
         <source>List of contributors on GitHub</source>
         <translation>Lista de colaboradores en GitHub</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="76"/>
+        <location filename="../aboutdialog.cpp" line="80"/>
         <source>Thanks to all people who contributed to this project.</source>
         <translation>Gracias a todas las personas que han colaborado en este proyecto.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="80"/>
+        <location filename="../aboutdialog.cpp" line="84"/>
         <source>Translators</source>
         <translation>Traductores</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="81"/>
+        <location filename="../aboutdialog.cpp" line="85"/>
         <source>I would like to thank the following people who volunteered to translate this application.</source>
         <translation>Me gustaría dar las gracias a las personas siguientes por ofrecerse a traducir esta aplicación.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="125"/>
+        <location filename="../aboutdialog.cpp" line="129"/>
         <source>%1 is built on the following free software libraries:</source>
         <comment>Free as in freedom</comment>
         <translation>%1 está construido sobre las bibliotecas de software libre siguientes:</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="149"/>
+        <location filename="../aboutdialog.cpp" line="153"/>
         <source>&amp;Special Thanks</source>
         <translation>Agradecimiento &amp;especial</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="151"/>
+        <location filename="../aboutdialog.cpp" line="155"/>
         <source>&amp;Third-party Libraries</source>
         <translation>&amp;Bibliotecas de terceros</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="87"/>
+        <location filename="../aboutdialog.cpp" line="91"/>
         <source>Your Rights</source>
         <translation>Sus derechos</translation>
     </message>
@@ -114,63 +114,63 @@
         <translation>Evita restablecer el estado de zoom/rotación/inversión que se aplicó a la vista de la imagen al cambiar entre las imágenes.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="57"/>
+        <location filename="../aboutdialog.cpp" line="61"/>
         <source>Copyright (c) %1 %2</source>
         <comment>%1 is year, %2 is the name of copyright holder(s)</comment>
         <translation>Copyright (c) %1 %2</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="89"/>
+        <location filename="../aboutdialog.cpp" line="93"/>
         <source>%1 is released under the MIT License.</source>
         <translation>%1 se publica bajo la licencia MIT.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="90"/>
+        <location filename="../aboutdialog.cpp" line="94"/>
         <source>This license grants people a number of freedoms:</source>
         <translation>Esta licencia otorga a las personas una serie de libertades:</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="91"/>
+        <location filename="../aboutdialog.cpp" line="95"/>
         <source>You are free to use %1, for any purpose</source>
         <translation>Es libre de usar %1 para cualquier propósito</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="92"/>
+        <location filename="../aboutdialog.cpp" line="96"/>
         <source>You are free to distribute %1</source>
         <translation>Es libre de distribuir %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="93"/>
+        <location filename="../aboutdialog.cpp" line="97"/>
         <source>You can study how %1 works and change it</source>
         <translation>Puede estudiar cómo funciona %1 y modificarlo</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="94"/>
+        <location filename="../aboutdialog.cpp" line="98"/>
         <source>You can distribute changed versions of %1</source>
         <translation>Puede distribuir versiones modificadas de %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="96"/>
+        <location filename="../aboutdialog.cpp" line="100"/>
         <source>The MIT license guarantees you this freedom. Nobody is ever permitted to take it away.</source>
         <translation>La licencia MIT le garantiza esta libertad. Nadie está autorizado a quitársela.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="124"/>
+        <location filename="../aboutdialog.cpp" line="128"/>
         <source>Third-party Libraries used by %1</source>
         <translation>Bibliotecas de terceros usadas por %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="147"/>
+        <location filename="../aboutdialog.cpp" line="151"/>
         <source>&amp;Help</source>
         <translation>Ay&amp;uda</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="148"/>
+        <location filename="../aboutdialog.cpp" line="152"/>
         <source>&amp;About</source>
         <translation>&amp;Acerca de</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="150"/>
+        <location filename="../aboutdialog.cpp" line="154"/>
         <source>&amp;License</source>
         <translation>&amp;Licencia</translation>
     </message>
@@ -191,13 +191,13 @@
         <translation type="vanished">La lista de ubicaciones está vacía</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="51"/>
+        <location filename="../graphicsview.cpp" line="52"/>
         <source>File is not a valid image</source>
         <translation>El archivo no es una imagen válida</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="55"/>
-        <location filename="../graphicsview.cpp" line="59"/>
+        <location filename="../graphicsview.cpp" line="56"/>
+        <location filename="../graphicsview.cpp" line="60"/>
         <source>Image data is invalid or currently unsupported</source>
         <translation>Los datos de la imagen no son válidos o no son compatibles</translation>
     </message>
@@ -236,7 +236,7 @@
     <message>
         <location filename="../mainwindow.cpp" line="742"/>
         <source>Image From Clipboard</source>
-        <translation type="unfinished"></translation>
+        <translation>Imagen del portapapeles</translation>
     </message>
     <message>
         <location filename="../mainwindow.cpp" line="760"/>
@@ -300,12 +300,12 @@
     <message>
         <location filename="../actionmanager.cpp" line="106"/>
         <source>Fit to view</source>
-        <translation type="unfinished"></translation>
+        <translation>Para visualizar</translation>
     </message>
     <message>
         <location filename="../actionmanager.cpp" line="107"/>
         <source>Fit to width</source>
-        <translation type="unfinished"></translation>
+        <translation>Ajustar al ancho</translation>
     </message>
     <message>
         <location filename="../actionmanager.cpp" line="110"/>
@@ -340,7 +340,7 @@
     <message>
         <location filename="../actionmanager.cpp" line="100"/>
         <source>Rotate left</source>
-        <translation type="unfinished"></translation>
+        <translation>Girar a la izquierda</translation>
     </message>
     <message>
         <location filename="../actionmanager.cpp" line="102"/>
@@ -711,91 +711,96 @@
 <context>
     <name>SettingsDialog</name>
     <message>
-        <location filename="../settingsdialog.cpp" line="22"/>
+        <location filename="../settingsdialog.cpp" line="23"/>
         <source>Settings</source>
         <translation>Preferencias</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="27"/>
+        <location filename="../settingsdialog.cpp" line="28"/>
         <source>Do nothing</source>
         <translation>No hacer nada</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="28"/>
+        <location filename="../settingsdialog.cpp" line="29"/>
         <source>Close the window</source>
         <translation>Cerrar la ventana</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="29"/>
+        <location filename="../settingsdialog.cpp" line="30"/>
         <source>Toggle maximize</source>
         <translation>Maximizar/desmaximizar</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="33"/>
+        <location filename="../settingsdialog.cpp" line="34"/>
         <source>Zoom in and out</source>
         <translation>Ampliar y reducir</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="34"/>
+        <location filename="../settingsdialog.cpp" line="35"/>
         <source>View next or previous item</source>
         <translation>Mostrar el elemento siguiente/anterior</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="38"/>
+        <location filename="../settingsdialog.cpp" line="39"/>
         <source>Auto size</source>
         <translation>Tamaño automático</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="39"/>
+        <location filename="../settingsdialog.cpp" line="40"/>
         <source>Maximized</source>
         <translation>Maximizar</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="43"/>
+        <location filename="../settingsdialog.cpp" line="44"/>
         <source>Round (Integer scaling)</source>
         <comment>This option means round up for .5 and above</comment>
         <translation>Redondeo (escala de enteros)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="44"/>
+        <location filename="../settingsdialog.cpp" line="45"/>
         <source>Ceil (Integer scaling)</source>
         <comment>This option means always round up</comment>
         <translation>Ceil (redondear enteros hacia arriba)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="45"/>
+        <location filename="../settingsdialog.cpp" line="46"/>
         <source>Floor (Integer scaling)</source>
         <comment>This option means always round down</comment>
         <translation>Floor (redondear enteros hacia abajo)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="46"/>
+        <location filename="../settingsdialog.cpp" line="47"/>
         <source>Follow system (Fractional scaling)</source>
         <comment>This option means don&apos;t round</comment>
         <translation>Redondeo (redondear los enteros)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="69"/>
+        <location filename="../settingsdialog.cpp" line="70"/>
         <source>Stay on top when start-up</source>
         <translation>Mantener encima al inicio</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="70"/>
+        <location filename="../settingsdialog.cpp" line="71"/>
+        <source>Use light-color checkerboard</source>
+        <translation>Utilice un tablero de ajedrez de color claro</translation>
+    </message>
+    <message>
+        <location filename="../settingsdialog.cpp" line="72"/>
         <source>Double-click behavior</source>
         <translation>Comportamiento del doble clic</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="71"/>
+        <location filename="../settingsdialog.cpp" line="73"/>
         <source>Mouse wheel behavior</source>
         <translation>Comportamiento de la rueda del ratón</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="72"/>
+        <location filename="../settingsdialog.cpp" line="74"/>
         <source>Default window size</source>
         <translation>Tamaño de la ventana por defecto</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="73"/>
+        <location filename="../settingsdialog.cpp" line="75"/>
         <source>HiDPI scale factor rounding policy</source>
         <translation>Política de redondeo del factor de escala HiDPI</translation>
     </message>
@@ -808,12 +813,12 @@
         <translation>Pineapple Pictures</translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="44"/>
+        <location filename="../main.cpp" line="45"/>
         <source>List supported image format suffixes, and quit program.</source>
-        <translation type="unfinished"></translation>
+        <translation>Enumere las extensiones de formato de imagen admitidas y sal del programa.</translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="48"/>
+        <location filename="../main.cpp" line="49"/>
         <source>File list.</source>
         <translation>Lista de archivos.</translation>
     </message>

app/translations/PineapplePictures_fr.ts

@@ -39,7 +39,7 @@
         <translation>Éviter de fermer la fenêtre accidentellement. (par exemple en cliquant deux fois sur la fenêtre)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="54"/>
+        <location filename="../aboutdialog.cpp" line="53"/>
         <source>Version: %1</source>
         <translation>Version&#xa0;: %1</translation>
     </message>
@@ -48,63 +48,63 @@
         <translation type="vanished">Copyright © 2020 %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="60"/>
+        <location filename="../aboutdialog.cpp" line="64"/>
         <source>Logo designed by %1</source>
         <translation>Logo conçu par %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="62"/>
+        <location filename="../aboutdialog.cpp" line="66"/>
         <source>Built with Qt %1 (%2)</source>
         <translation>Fait avec Qt %1 (%2)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="63"/>
+        <location filename="../aboutdialog.cpp" line="67"/>
         <source>Source code</source>
         <translation>Code source</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="73"/>
+        <location filename="../aboutdialog.cpp" line="77"/>
         <source>Contributors</source>
         <translation>Contributeurs</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="75"/>
+        <location filename="../aboutdialog.cpp" line="79"/>
         <source>List of contributors on GitHub</source>
         <translation>Liste des contributeurs sur GitHub</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="76"/>
+        <location filename="../aboutdialog.cpp" line="80"/>
         <source>Thanks to all people who contributed to this project.</source>
         <translation>Merci à toutes les personnes qui ont contribué à ce projet.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="80"/>
+        <location filename="../aboutdialog.cpp" line="84"/>
         <source>Translators</source>
         <translation>Traducteurs</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="81"/>
+        <location filename="../aboutdialog.cpp" line="85"/>
         <source>I would like to thank the following people who volunteered to translate this application.</source>
         <translation>Je tiens à remercier les personnes suivantes qui se sont portées volontaires pour traduire cette application.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="125"/>
+        <location filename="../aboutdialog.cpp" line="129"/>
         <source>%1 is built on the following free software libraries:</source>
         <comment>Free as in freedom</comment>
         <translation>%1 est basé sur les bibliothèques de logiciels libres suivantes&#xa0;:</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="149"/>
+        <location filename="../aboutdialog.cpp" line="153"/>
         <source>&amp;Special Thanks</source>
         <translation>&amp;Remerciement spécial</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="151"/>
+        <location filename="../aboutdialog.cpp" line="155"/>
         <source>&amp;Third-party Libraries</source>
         <translation>&amp;Bibliothèques tierces</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="87"/>
+        <location filename="../aboutdialog.cpp" line="91"/>
         <source>Your Rights</source>
         <translation>Vos droits</translation>
     </message>
@@ -114,63 +114,63 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="57"/>
+        <location filename="../aboutdialog.cpp" line="61"/>
         <source>Copyright (c) %1 %2</source>
         <comment>%1 is year, %2 is the name of copyright holder(s)</comment>
         <translation>Copyright (c) %1 %2</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="89"/>
+        <location filename="../aboutdialog.cpp" line="93"/>
         <source>%1 is released under the MIT License.</source>
         <translation>%1 est publié sous licence MIT.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="90"/>
+        <location filename="../aboutdialog.cpp" line="94"/>
         <source>This license grants people a number of freedoms:</source>
         <translation>Cette licence accorde aux personnes un certain nombre de libertés&#xa0;:</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="91"/>
+        <location filename="../aboutdialog.cpp" line="95"/>
         <source>You are free to use %1, for any purpose</source>
         <translation>Vous êtes libre d&apos;utiliser %1, dans n&apos;importe quel but</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="92"/>
+        <location filename="../aboutdialog.cpp" line="96"/>
         <source>You are free to distribute %1</source>
         <translation>Vous êtes libre de distribuer %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="93"/>
+        <location filename="../aboutdialog.cpp" line="97"/>
         <source>You can study how %1 works and change it</source>
         <translation>Vous pouvez étudier le fonctionnement de %1 et le modifier</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="94"/>
+        <location filename="../aboutdialog.cpp" line="98"/>
         <source>You can distribute changed versions of %1</source>
         <translation>Vous pouvez distribuer des versions modifiées de %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="96"/>
+        <location filename="../aboutdialog.cpp" line="100"/>
         <source>The MIT license guarantees you this freedom. Nobody is ever permitted to take it away.</source>
         <translation>La licence MIT vous garantit cette liberté. Personne n&apos;est autorisé à l&apos;enlever.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="124"/>
+        <location filename="../aboutdialog.cpp" line="128"/>
         <source>Third-party Libraries used by %1</source>
         <translation>Bibliothèques tierces utilisées par %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="147"/>
+        <location filename="../aboutdialog.cpp" line="151"/>
         <source>&amp;Help</source>
         <translation>&amp;Aide</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="148"/>
+        <location filename="../aboutdialog.cpp" line="152"/>
         <source>&amp;About</source>
         <translation>&amp;À propos</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="150"/>
+        <location filename="../aboutdialog.cpp" line="154"/>
         <source>&amp;License</source>
         <translation>&amp;Licence</translation>
     </message>
@@ -191,13 +191,13 @@
         <translation type="vanished">La liste des URL du fichier est vide</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="51"/>
+        <location filename="../graphicsview.cpp" line="52"/>
         <source>File is not a valid image</source>
         <translation>Le fichier n&apos;est pas une image valide</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="55"/>
-        <location filename="../graphicsview.cpp" line="59"/>
+        <location filename="../graphicsview.cpp" line="56"/>
+        <location filename="../graphicsview.cpp" line="60"/>
         <source>Image data is invalid or currently unsupported</source>
         <translation>Les données d&apos;image ne sont pas valides ou ne sont actuellement pas prises en charge</translation>
     </message>
@@ -711,91 +711,96 @@
 <context>
     <name>SettingsDialog</name>
     <message>
-        <location filename="../settingsdialog.cpp" line="22"/>
+        <location filename="../settingsdialog.cpp" line="23"/>
         <source>Settings</source>
         <translation>Paramètres</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="27"/>
+        <location filename="../settingsdialog.cpp" line="28"/>
         <source>Do nothing</source>
         <translation>Ne rien faire</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="28"/>
+        <location filename="../settingsdialog.cpp" line="29"/>
         <source>Close the window</source>
         <translation>Fermer la fenêtre</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="29"/>
+        <location filename="../settingsdialog.cpp" line="30"/>
         <source>Toggle maximize</source>
         <translation>Activer/désactiver l&apos;agrandissement</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="33"/>
+        <location filename="../settingsdialog.cpp" line="34"/>
         <source>Zoom in and out</source>
         <translation>Zoom avant et arrière</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="34"/>
+        <location filename="../settingsdialog.cpp" line="35"/>
         <source>View next or previous item</source>
         <translation>Voir l&apos;élément suivant ou précédent</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="38"/>
+        <location filename="../settingsdialog.cpp" line="39"/>
         <source>Auto size</source>
         <translation>Taille automatique</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="39"/>
+        <location filename="../settingsdialog.cpp" line="40"/>
         <source>Maximized</source>
         <translation>Agrandi</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="43"/>
+        <location filename="../settingsdialog.cpp" line="44"/>
         <source>Round (Integer scaling)</source>
         <comment>This option means round up for .5 and above</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="44"/>
+        <location filename="../settingsdialog.cpp" line="45"/>
         <source>Ceil (Integer scaling)</source>
         <comment>This option means always round up</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="45"/>
+        <location filename="../settingsdialog.cpp" line="46"/>
         <source>Floor (Integer scaling)</source>
         <comment>This option means always round down</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="46"/>
+        <location filename="../settingsdialog.cpp" line="47"/>
         <source>Follow system (Fractional scaling)</source>
         <comment>This option means don&apos;t round</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="69"/>
+        <location filename="../settingsdialog.cpp" line="70"/>
         <source>Stay on top when start-up</source>
         <translation>Rester en-haut lors du démarrage</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="70"/>
+        <location filename="../settingsdialog.cpp" line="71"/>
+        <source>Use light-color checkerboard</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../settingsdialog.cpp" line="72"/>
         <source>Double-click behavior</source>
         <translation>Comportement du double-clic</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="71"/>
+        <location filename="../settingsdialog.cpp" line="73"/>
         <source>Mouse wheel behavior</source>
         <translation>Comportement de la molette de la souris</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="72"/>
+        <location filename="../settingsdialog.cpp" line="74"/>
         <source>Default window size</source>
         <translation>Taille de la fenêtre par défaut</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="73"/>
+        <location filename="../settingsdialog.cpp" line="75"/>
         <source>HiDPI scale factor rounding policy</source>
         <translation type="unfinished"></translation>
     </message>
@@ -808,12 +813,12 @@
         <translation>Pineapple Pictures</translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="44"/>
+        <location filename="../main.cpp" line="45"/>
         <source>List supported image format suffixes, and quit program.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="48"/>
+        <location filename="../main.cpp" line="49"/>
         <source>File list.</source>
         <translation>Liste des fichiers.</translation>
     </message>

app/translations/PineapplePictures_id.ts

@@ -39,7 +39,7 @@
         <translation>Hindari penutupan jendela secara tidak sengaja (contoh dengan mengklik jendela dua kali)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="54"/>
+        <location filename="../aboutdialog.cpp" line="53"/>
         <source>Version: %1</source>
         <translation>Versi: %1</translation>
     </message>
@@ -48,63 +48,63 @@
         <translation type="vanished">Hak Cipta (c) 2020 %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="60"/>
+        <location filename="../aboutdialog.cpp" line="64"/>
         <source>Logo designed by %1</source>
         <translation>Logo didesain oleh %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="62"/>
+        <location filename="../aboutdialog.cpp" line="66"/>
         <source>Built with Qt %1 (%2)</source>
         <translation>Dibuat dengan Qt %1 (%2)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="63"/>
+        <location filename="../aboutdialog.cpp" line="67"/>
         <source>Source code</source>
         <translation>Kode sumber</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="73"/>
+        <location filename="../aboutdialog.cpp" line="77"/>
         <source>Contributors</source>
         <translation>Kontributor-kontributor</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="75"/>
+        <location filename="../aboutdialog.cpp" line="79"/>
         <source>List of contributors on GitHub</source>
         <translation>Daftar kontributor di GitHub</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="76"/>
+        <location filename="../aboutdialog.cpp" line="80"/>
         <source>Thanks to all people who contributed to this project.</source>
         <translation>Terima kasih kepada semua orang yang telah berkontribusi ke proyek ini.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="80"/>
+        <location filename="../aboutdialog.cpp" line="84"/>
         <source>Translators</source>
         <translation>Penerjemah</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="81"/>
+        <location filename="../aboutdialog.cpp" line="85"/>
         <source>I would like to thank the following people who volunteered to translate this application.</source>
         <translation>Saya ingin berterima kasih orang-orang berikut yang secara sukarela menerjemahkan aplikasi ini.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="125"/>
+        <location filename="../aboutdialog.cpp" line="129"/>
         <source>%1 is built on the following free software libraries:</source>
         <comment>Free as in freedom</comment>
         <translation>%1 dibangun dengan perpustakaan perangkat lunak bebas berikut:</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="149"/>
+        <location filename="../aboutdialog.cpp" line="153"/>
         <source>&amp;Special Thanks</source>
         <translation>&amp;Terima kasih</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="151"/>
+        <location filename="../aboutdialog.cpp" line="155"/>
         <source>&amp;Third-party Libraries</source>
         <translation>&amp; Perpustakaan pihak ketiga</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="87"/>
+        <location filename="../aboutdialog.cpp" line="91"/>
         <source>Your Rights</source>
         <translation>Hak Anda</translation>
     </message>
@@ -114,63 +114,63 @@
         <translation>Hindari mengatur ulang keadaan zoom/rotasi/flip yang diterapkan pada tampilan gambar saat beralih antara gambar.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="57"/>
+        <location filename="../aboutdialog.cpp" line="61"/>
         <source>Copyright (c) %1 %2</source>
         <comment>%1 is year, %2 is the name of copyright holder(s)</comment>
         <translation>Hak Cipta (c) %1 %2</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="89"/>
+        <location filename="../aboutdialog.cpp" line="93"/>
         <source>%1 is released under the MIT License.</source>
         <translation>%1 diluncurkan di bawah lisensi MIT.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="90"/>
+        <location filename="../aboutdialog.cpp" line="94"/>
         <source>This license grants people a number of freedoms:</source>
         <translation>Lisensi ini memberikan orang-orang beberapa kebebasan:</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="91"/>
+        <location filename="../aboutdialog.cpp" line="95"/>
         <source>You are free to use %1, for any purpose</source>
         <translation>Anda bebas menggunakan %1, untuk tujuan apapun</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="92"/>
+        <location filename="../aboutdialog.cpp" line="96"/>
         <source>You are free to distribute %1</source>
         <translation>Anda bebas mendistribusikan %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="93"/>
+        <location filename="../aboutdialog.cpp" line="97"/>
         <source>You can study how %1 works and change it</source>
         <translation>Anda dapat mempelajari bagaimana cara %1 bekerja dan mengubahnya</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="94"/>
+        <location filename="../aboutdialog.cpp" line="98"/>
         <source>You can distribute changed versions of %1</source>
         <translation>Anda dapat mendistribusikan versi %1 yang telah diubah</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="96"/>
+        <location filename="../aboutdialog.cpp" line="100"/>
         <source>The MIT license guarantees you this freedom. Nobody is ever permitted to take it away.</source>
         <translation>Lisensi MIT menjamin kebebasan ini. Tidak ada yang pernah diizinkan untuk mengambilnya.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="124"/>
+        <location filename="../aboutdialog.cpp" line="128"/>
         <source>Third-party Libraries used by %1</source>
         <translation>Perpustakaan pihak ketiga yang digunakan oleh %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="147"/>
+        <location filename="../aboutdialog.cpp" line="151"/>
         <source>&amp;Help</source>
         <translation>&amp;Dukungan</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="148"/>
+        <location filename="../aboutdialog.cpp" line="152"/>
         <source>&amp;About</source>
         <translation>Tentan&amp;g</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="150"/>
+        <location filename="../aboutdialog.cpp" line="154"/>
         <source>&amp;License</source>
         <translation>&amp;Lisensi</translation>
     </message>
@@ -191,13 +191,13 @@
         <translation type="vanished">Daftar url file kosong</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="51"/>
+        <location filename="../graphicsview.cpp" line="52"/>
         <source>File is not a valid image</source>
         <translation>File bukan gambar yang valid</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="55"/>
-        <location filename="../graphicsview.cpp" line="59"/>
+        <location filename="../graphicsview.cpp" line="56"/>
+        <location filename="../graphicsview.cpp" line="60"/>
         <source>Image data is invalid or currently unsupported</source>
         <translation>Data gambar tidak valid atau belum didukung</translation>
     </message>
@@ -711,91 +711,96 @@
 <context>
     <name>SettingsDialog</name>
     <message>
-        <location filename="../settingsdialog.cpp" line="22"/>
+        <location filename="../settingsdialog.cpp" line="23"/>
         <source>Settings</source>
         <translation>Pengaturan</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="27"/>
+        <location filename="../settingsdialog.cpp" line="28"/>
         <source>Do nothing</source>
         <translation>Jangan lakukan apapun</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="28"/>
+        <location filename="../settingsdialog.cpp" line="29"/>
         <source>Close the window</source>
         <translation>Tutup jendela</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="29"/>
+        <location filename="../settingsdialog.cpp" line="30"/>
         <source>Toggle maximize</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="33"/>
+        <location filename="../settingsdialog.cpp" line="34"/>
         <source>Zoom in and out</source>
         <translation>Perbesar dan perkecil</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="34"/>
+        <location filename="../settingsdialog.cpp" line="35"/>
         <source>View next or previous item</source>
         <translation>Lihat item berikutnya atau sebelumnya</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="38"/>
+        <location filename="../settingsdialog.cpp" line="39"/>
         <source>Auto size</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="39"/>
+        <location filename="../settingsdialog.cpp" line="40"/>
         <source>Maximized</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="43"/>
+        <location filename="../settingsdialog.cpp" line="44"/>
         <source>Round (Integer scaling)</source>
         <comment>This option means round up for .5 and above</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="44"/>
+        <location filename="../settingsdialog.cpp" line="45"/>
         <source>Ceil (Integer scaling)</source>
         <comment>This option means always round up</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="45"/>
+        <location filename="../settingsdialog.cpp" line="46"/>
         <source>Floor (Integer scaling)</source>
         <comment>This option means always round down</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="46"/>
+        <location filename="../settingsdialog.cpp" line="47"/>
         <source>Follow system (Fractional scaling)</source>
         <comment>This option means don&apos;t round</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="69"/>
+        <location filename="../settingsdialog.cpp" line="70"/>
         <source>Stay on top when start-up</source>
         <translation type="unfinished"></translation>
     </message>
-    <message>
-        <location filename="../settingsdialog.cpp" line="70"/>
-        <source>Double-click behavior</source>
-        <translation type="unfinished"></translation>
-    </message>
     <message>
         <location filename="../settingsdialog.cpp" line="71"/>
-        <source>Mouse wheel behavior</source>
+        <source>Use light-color checkerboard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../settingsdialog.cpp" line="72"/>
-        <source>Default window size</source>
+        <source>Double-click behavior</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../settingsdialog.cpp" line="73"/>
+        <source>Mouse wheel behavior</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../settingsdialog.cpp" line="74"/>
+        <source>Default window size</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../settingsdialog.cpp" line="75"/>
         <source>HiDPI scale factor rounding policy</source>
         <translation type="unfinished"></translation>
     </message>
@@ -808,12 +813,12 @@
         <translation>Pineapple Pictures</translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="44"/>
+        <location filename="../main.cpp" line="45"/>
         <source>List supported image format suffixes, and quit program.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="48"/>
+        <location filename="../main.cpp" line="49"/>
         <source>File list.</source>
         <translation>Daftar berkas.</translation>
     </message>

app/translations/PineapplePictures_it.ts

@@ -44,129 +44,129 @@
         <translation>Evitare di reimpostare lo stato di zoom/rotazione/capovolgimento applicato alla visualizzazione dell&apos;immagine quando si passa da un&apos;immagine all&apos;altra.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="54"/>
+        <location filename="../aboutdialog.cpp" line="53"/>
         <source>Version: %1</source>
         <translation>Versione: %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="60"/>
+        <location filename="../aboutdialog.cpp" line="64"/>
         <source>Logo designed by %1</source>
         <translation>Logo disegnato da %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="62"/>
+        <location filename="../aboutdialog.cpp" line="66"/>
         <source>Built with Qt %1 (%2)</source>
         <translation>Costruito con Qt %1 (%2)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="63"/>
+        <location filename="../aboutdialog.cpp" line="67"/>
         <source>Source code</source>
         <translation>Codice sorgente</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="73"/>
+        <location filename="../aboutdialog.cpp" line="77"/>
         <source>Contributors</source>
         <translation>Contributori</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="75"/>
+        <location filename="../aboutdialog.cpp" line="79"/>
         <source>List of contributors on GitHub</source>
         <translation>Elenco dei contributori su GitHub</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="76"/>
+        <location filename="../aboutdialog.cpp" line="80"/>
         <source>Thanks to all people who contributed to this project.</source>
         <translation>Grazie a tutte le persone che hanno contribuito a questo progetto.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="80"/>
+        <location filename="../aboutdialog.cpp" line="84"/>
         <source>Translators</source>
         <translation>Traduttori</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="81"/>
+        <location filename="../aboutdialog.cpp" line="85"/>
         <source>I would like to thank the following people who volunteered to translate this application.</source>
         <translation>Vorrei ringraziare le seguenti persone che si sono offerte volontarie per tradurre questa applicazione.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="125"/>
+        <location filename="../aboutdialog.cpp" line="129"/>
         <source>%1 is built on the following free software libraries:</source>
         <comment>Free as in freedom</comment>
         <translation>%1 si basa sulle seguenti librerie di software libero:</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="149"/>
+        <location filename="../aboutdialog.cpp" line="153"/>
         <source>&amp;Special Thanks</source>
         <translation>&amp;Ringraziamenti speciali</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="151"/>
+        <location filename="../aboutdialog.cpp" line="155"/>
         <source>&amp;Third-party Libraries</source>
         <translation>&amp;Librerie di terze parti</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="87"/>
+        <location filename="../aboutdialog.cpp" line="91"/>
         <source>Your Rights</source>
         <translation>I tuoi diritti</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="57"/>
+        <location filename="../aboutdialog.cpp" line="61"/>
         <source>Copyright (c) %1 %2</source>
         <comment>%1 is year, %2 is the name of copyright holder(s)</comment>
         <translation>Copyright (c) %1 %2</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="89"/>
+        <location filename="../aboutdialog.cpp" line="93"/>
         <source>%1 is released under the MIT License.</source>
         <translation>%1 è rilasciato sotto licenza MIT.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="90"/>
+        <location filename="../aboutdialog.cpp" line="94"/>
         <source>This license grants people a number of freedoms:</source>
         <translation>Questa licenza garantisce alle persone una serie di libertà:</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="91"/>
+        <location filename="../aboutdialog.cpp" line="95"/>
         <source>You are free to use %1, for any purpose</source>
         <translation>Sei libero di usare %1, per qualsiasi scopo</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="92"/>
+        <location filename="../aboutdialog.cpp" line="96"/>
         <source>You are free to distribute %1</source>
         <translation>Sei libero di distribuire %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="93"/>
+        <location filename="../aboutdialog.cpp" line="97"/>
         <source>You can study how %1 works and change it</source>
         <translation>Puoi studiare come funziona %1 e cambiarlo</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="94"/>
+        <location filename="../aboutdialog.cpp" line="98"/>
         <source>You can distribute changed versions of %1</source>
         <translation>Puoi distribuire versioni modificate di %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="96"/>
+        <location filename="../aboutdialog.cpp" line="100"/>
         <source>The MIT license guarantees you this freedom. Nobody is ever permitted to take it away.</source>
         <translation>La licenza MIT ti garantisce questa libertà. A nessuno è mai permesso portarlo via.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="124"/>
+        <location filename="../aboutdialog.cpp" line="128"/>
         <source>Third-party Libraries used by %1</source>
         <translation>Librerie di terze parti utilizzate da %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="147"/>
+        <location filename="../aboutdialog.cpp" line="151"/>
         <source>&amp;Help</source>
         <translation>&amp;Aiuto</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="148"/>
+        <location filename="../aboutdialog.cpp" line="152"/>
         <source>&amp;About</source>
         <translation>&amp;Informazioni</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="150"/>
+        <location filename="../aboutdialog.cpp" line="154"/>
         <source>&amp;License</source>
         <translation>&amp;Licenza</translation>
     </message>
@@ -187,13 +187,13 @@
         <translation type="vanished">L&apos;elenco degli URL dei file è vuoto</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="51"/>
+        <location filename="../graphicsview.cpp" line="52"/>
         <source>File is not a valid image</source>
         <translation>Il file non è un&apos;immagine valida</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="55"/>
-        <location filename="../graphicsview.cpp" line="59"/>
+        <location filename="../graphicsview.cpp" line="56"/>
+        <location filename="../graphicsview.cpp" line="60"/>
         <source>Image data is invalid or currently unsupported</source>
         <translation>I dati dell&apos;immagine non sono validi o non sono attualmente supportati</translation>
     </message>
@@ -232,7 +232,7 @@
     <message>
         <location filename="../mainwindow.cpp" line="742"/>
         <source>Image From Clipboard</source>
-        <translation type="unfinished"></translation>
+        <translation>Immagine dagli appunti</translation>
     </message>
     <message>
         <location filename="../mainwindow.cpp" line="760"/>
@@ -296,12 +296,12 @@
     <message>
         <location filename="../actionmanager.cpp" line="106"/>
         <source>Fit to view</source>
-        <translation type="unfinished"></translation>
+        <translation>Adatto alla visualizzazione</translation>
     </message>
     <message>
         <location filename="../actionmanager.cpp" line="107"/>
         <source>Fit to width</source>
-        <translation type="unfinished"></translation>
+        <translation>Adatta alla larghezza</translation>
     </message>
     <message>
         <location filename="../actionmanager.cpp" line="110"/>
@@ -336,7 +336,7 @@
     <message>
         <location filename="../actionmanager.cpp" line="100"/>
         <source>Rotate left</source>
-        <translation type="unfinished"></translation>
+        <translation>Ruota a sinistra</translation>
     </message>
     <message>
         <location filename="../actionmanager.cpp" line="102"/>
@@ -707,91 +707,96 @@
 <context>
     <name>SettingsDialog</name>
     <message>
-        <location filename="../settingsdialog.cpp" line="22"/>
+        <location filename="../settingsdialog.cpp" line="23"/>
         <source>Settings</source>
         <translation>Impostazioni</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="27"/>
+        <location filename="../settingsdialog.cpp" line="28"/>
         <source>Do nothing</source>
         <translation>Non fare nulla</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="28"/>
+        <location filename="../settingsdialog.cpp" line="29"/>
         <source>Close the window</source>
         <translation>Chiudi la finestra</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="29"/>
+        <location filename="../settingsdialog.cpp" line="30"/>
         <source>Toggle maximize</source>
         <translation>Attiva massimizzazione</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="33"/>
+        <location filename="../settingsdialog.cpp" line="34"/>
         <source>Zoom in and out</source>
         <translation>Zoom avanti e indietro</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="34"/>
+        <location filename="../settingsdialog.cpp" line="35"/>
         <source>View next or previous item</source>
         <translation>Visualizza l&apos;elemento successivo o precedente</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="38"/>
+        <location filename="../settingsdialog.cpp" line="39"/>
         <source>Auto size</source>
         <translation>Dimensione automatica</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="39"/>
+        <location filename="../settingsdialog.cpp" line="40"/>
         <source>Maximized</source>
         <translation>Massimizzato</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="43"/>
+        <location filename="../settingsdialog.cpp" line="44"/>
         <source>Round (Integer scaling)</source>
         <comment>This option means round up for .5 and above</comment>
         <translation>Round (ridimensionamento intero)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="44"/>
+        <location filename="../settingsdialog.cpp" line="45"/>
         <source>Ceil (Integer scaling)</source>
         <comment>This option means always round up</comment>
         <translation>Ceil (ridimensionamento intero)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="45"/>
+        <location filename="../settingsdialog.cpp" line="46"/>
         <source>Floor (Integer scaling)</source>
         <comment>This option means always round down</comment>
         <translation>Floor (ridimensionamento intero)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="46"/>
+        <location filename="../settingsdialog.cpp" line="47"/>
         <source>Follow system (Fractional scaling)</source>
         <comment>This option means don&apos;t round</comment>
         <translation>Segui il sistema (scala frazionaria)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="69"/>
+        <location filename="../settingsdialog.cpp" line="70"/>
         <source>Stay on top when start-up</source>
         <translation>Rimani in cima quando si avvia</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="70"/>
+        <location filename="../settingsdialog.cpp" line="71"/>
+        <source>Use light-color checkerboard</source>
+        <translation>Utilizzare scacchiera di colore chiaro</translation>
+    </message>
+    <message>
+        <location filename="../settingsdialog.cpp" line="72"/>
         <source>Double-click behavior</source>
         <translation>Comportamento del doppio clic</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="71"/>
+        <location filename="../settingsdialog.cpp" line="73"/>
         <source>Mouse wheel behavior</source>
         <translation>Comportamento della rotellina del mouse</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="72"/>
+        <location filename="../settingsdialog.cpp" line="74"/>
         <source>Default window size</source>
         <translation>Dimensioni predefinite della finestra</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="73"/>
+        <location filename="../settingsdialog.cpp" line="75"/>
         <source>HiDPI scale factor rounding policy</source>
         <translation>Politica di arrotondamento del fattore di scala HiDPI</translation>
     </message>
@@ -804,12 +809,12 @@
         <translation>Immagini di Pineapple</translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="44"/>
+        <location filename="../main.cpp" line="45"/>
         <source>List supported image format suffixes, and quit program.</source>
-        <translation type="unfinished"></translation>
+        <translation>Elenca i suffissi dei formati immagine supportati e chiudi il programma.</translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="48"/>
+        <location filename="../main.cpp" line="49"/>
         <source>File list.</source>
         <translation>Elenco file.</translation>
     </message>

app/translations/PineapplePictures_ja.ts

@@ -44,129 +44,129 @@
         <translation>画像を切り替える時に、画像表示に適用されているズーム、回転、反転の状態を維持します。</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="54"/>
+        <location filename="../aboutdialog.cpp" line="53"/>
         <source>Version: %1</source>
         <translation>バージョン: %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="60"/>
+        <location filename="../aboutdialog.cpp" line="64"/>
         <source>Logo designed by %1</source>
         <translation>ロゴデザイン: %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="62"/>
+        <location filename="../aboutdialog.cpp" line="66"/>
         <source>Built with Qt %1 (%2)</source>
         <translation>Qt %1 (%2) でビルドされました</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="63"/>
+        <location filename="../aboutdialog.cpp" line="67"/>
         <source>Source code</source>
         <translation>ソースコード</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="73"/>
+        <location filename="../aboutdialog.cpp" line="77"/>
         <source>Contributors</source>
         <translation>貢献者</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="75"/>
+        <location filename="../aboutdialog.cpp" line="79"/>
         <source>List of contributors on GitHub</source>
         <translation>GitHubでの貢献者リスト</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="76"/>
+        <location filename="../aboutdialog.cpp" line="80"/>
         <source>Thanks to all people who contributed to this project.</source>
         <translation>このプロジェクトに貢献したすべての人に感謝します。</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="80"/>
+        <location filename="../aboutdialog.cpp" line="84"/>
         <source>Translators</source>
         <translation>翻訳者</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="81"/>
+        <location filename="../aboutdialog.cpp" line="85"/>
         <source>I would like to thank the following people who volunteered to translate this application.</source>
         <translation>このアプリケーションの翻訳にボランティアで参加してくださった以下の方々に感謝します。</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="125"/>
+        <location filename="../aboutdialog.cpp" line="129"/>
         <source>%1 is built on the following free software libraries:</source>
         <comment>Free as in freedom</comment>
         <translation>%1は以下のフリーソフトウェア・ライブラリで構築されています。</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="149"/>
+        <location filename="../aboutdialog.cpp" line="153"/>
         <source>&amp;Special Thanks</source>
         <translation>スペシャルサンクス(&amp;S)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="151"/>
+        <location filename="../aboutdialog.cpp" line="155"/>
         <source>&amp;Third-party Libraries</source>
         <translation>サードパーティライブラリ(&amp;T)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="87"/>
+        <location filename="../aboutdialog.cpp" line="91"/>
         <source>Your Rights</source>
         <translation>利用者の権利</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="57"/>
+        <location filename="../aboutdialog.cpp" line="61"/>
         <source>Copyright (c) %1 %2</source>
         <comment>%1 is year, %2 is the name of copyright holder(s)</comment>
         <translation>Copyright (c) %1 %2</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="89"/>
+        <location filename="../aboutdialog.cpp" line="93"/>
         <source>%1 is released under the MIT License.</source>
         <translation>%1は、MITライセンスのもとで公開されています。</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="90"/>
+        <location filename="../aboutdialog.cpp" line="94"/>
         <source>This license grants people a number of freedoms:</source>
         <translation>このライセンスは人々に多くの自由を与えます。</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="91"/>
+        <location filename="../aboutdialog.cpp" line="95"/>
         <source>You are free to use %1, for any purpose</source>
         <translation>%1は、どのような目的にも自由に使用するできます</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="92"/>
+        <location filename="../aboutdialog.cpp" line="96"/>
         <source>You are free to distribute %1</source>
         <translation>%1を自由に配布することができます</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="93"/>
+        <location filename="../aboutdialog.cpp" line="97"/>
         <source>You can study how %1 works and change it</source>
         <translation>%1がどのように作動するかを研究し、それを変更することができます</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="94"/>
+        <location filename="../aboutdialog.cpp" line="98"/>
         <source>You can distribute changed versions of %1</source>
         <translation>変更されたバージョンの %1を配布することができます</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="96"/>
+        <location filename="../aboutdialog.cpp" line="100"/>
         <source>The MIT license guarantees you this freedom. Nobody is ever permitted to take it away.</source>
         <translation>MITライセンスは、この自由を保証しています。誰もそれを奪うことは許されていません。</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="124"/>
+        <location filename="../aboutdialog.cpp" line="128"/>
         <source>Third-party Libraries used by %1</source>
         <translation>%1が使用するサードパーティライブラリ</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="147"/>
+        <location filename="../aboutdialog.cpp" line="151"/>
         <source>&amp;Help</source>
         <translation>へルプ(&amp;H)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="148"/>
+        <location filename="../aboutdialog.cpp" line="152"/>
         <source>&amp;About</source>
         <translation>情報(&amp;A)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="150"/>
+        <location filename="../aboutdialog.cpp" line="154"/>
         <source>&amp;License</source>
         <translation>ライセンス(&amp;L)</translation>
     </message>
@@ -187,13 +187,13 @@
         <translation type="vanished">ファイルURLリストがエンプティーです</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="51"/>
+        <location filename="../graphicsview.cpp" line="52"/>
         <source>File is not a valid image</source>
         <translation>ファイルが有効な画像ではありません</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="55"/>
-        <location filename="../graphicsview.cpp" line="59"/>
+        <location filename="../graphicsview.cpp" line="56"/>
+        <location filename="../graphicsview.cpp" line="60"/>
         <source>Image data is invalid or currently unsupported</source>
         <translation>無効またはサポートされていない画像データ</translation>
     </message>
@@ -232,7 +232,7 @@
     <message>
         <location filename="../mainwindow.cpp" line="742"/>
         <source>Image From Clipboard</source>
-        <translation type="unfinished"></translation>
+        <translation>クリップボードからの画像</translation>
     </message>
     <message>
         <location filename="../mainwindow.cpp" line="760"/>
@@ -336,7 +336,7 @@
     <message>
         <location filename="../actionmanager.cpp" line="100"/>
         <source>Rotate left</source>
-        <translation type="unfinished"></translation>
+        <translation>左に回転</translation>
     </message>
     <message>
         <location filename="../actionmanager.cpp" line="102"/>
@@ -707,91 +707,96 @@
 <context>
     <name>SettingsDialog</name>
     <message>
-        <location filename="../settingsdialog.cpp" line="22"/>
+        <location filename="../settingsdialog.cpp" line="23"/>
         <source>Settings</source>
         <translation>設定</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="27"/>
+        <location filename="../settingsdialog.cpp" line="28"/>
         <source>Do nothing</source>
         <translation>何もしない</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="28"/>
+        <location filename="../settingsdialog.cpp" line="29"/>
         <source>Close the window</source>
         <translation>ウィンドウを終了する</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="29"/>
+        <location filename="../settingsdialog.cpp" line="30"/>
         <source>Toggle maximize</source>
         <translation>最大サイズに切り替える</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="33"/>
+        <location filename="../settingsdialog.cpp" line="34"/>
         <source>Zoom in and out</source>
         <translation>拡大・縮小</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="34"/>
+        <location filename="../settingsdialog.cpp" line="35"/>
         <source>View next or previous item</source>
         <translation>次の項目または前の項目を表示</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="38"/>
+        <location filename="../settingsdialog.cpp" line="39"/>
         <source>Auto size</source>
         <translation>オートサイズ</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="39"/>
+        <location filename="../settingsdialog.cpp" line="40"/>
         <source>Maximized</source>
         <translation>最大化</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="43"/>
+        <location filename="../settingsdialog.cpp" line="44"/>
         <source>Round (Integer scaling)</source>
         <comment>This option means round up for .5 and above</comment>
         <translation>四捨五入 (整数スケーリング)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="44"/>
+        <location filename="../settingsdialog.cpp" line="45"/>
         <source>Ceil (Integer scaling)</source>
         <comment>This option means always round up</comment>
         <translation>切り上げ (整数スケーリング)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="45"/>
+        <location filename="../settingsdialog.cpp" line="46"/>
         <source>Floor (Integer scaling)</source>
         <comment>This option means always round down</comment>
         <translation>切り捨て (整数スケーリング)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="46"/>
+        <location filename="../settingsdialog.cpp" line="47"/>
         <source>Follow system (Fractional scaling)</source>
         <comment>This option means don&apos;t round</comment>
         <translation>システム設定に従う (小数スケーリング)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="69"/>
+        <location filename="../settingsdialog.cpp" line="70"/>
         <source>Stay on top when start-up</source>
         <translation>起動時に最前面に表示する</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="70"/>
+        <location filename="../settingsdialog.cpp" line="71"/>
+        <source>Use light-color checkerboard</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../settingsdialog.cpp" line="72"/>
         <source>Double-click behavior</source>
         <translation>ダブルクリックの動作</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="71"/>
+        <location filename="../settingsdialog.cpp" line="73"/>
         <source>Mouse wheel behavior</source>
         <translation>マウスホイールの動作</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="72"/>
+        <location filename="../settingsdialog.cpp" line="74"/>
         <source>Default window size</source>
         <translation>既定のウィンドウサイズ</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="73"/>
+        <location filename="../settingsdialog.cpp" line="75"/>
         <source>HiDPI scale factor rounding policy</source>
         <translation>高DPIスケーリングの四捨五入方法</translation>
     </message>
@@ -804,12 +809,12 @@
         <translation>Pineapple Pictures</translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="44"/>
+        <location filename="../main.cpp" line="45"/>
         <source>List supported image format suffixes, and quit program.</source>
-        <translation type="unfinished"></translation>
+        <translation>サポートされている画像形式の拡張子を一覧表示し、プログラムを終了します。</translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="48"/>
+        <location filename="../main.cpp" line="49"/>
         <source>File list.</source>
         <translation>ファイルリスト</translation>
     </message>

app/translations/PineapplePictures_ko.ts

@@ -44,129 +44,129 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="54"/>
+        <location filename="../aboutdialog.cpp" line="53"/>
         <source>Version: %1</source>
         <translation>버전: %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="60"/>
+        <location filename="../aboutdialog.cpp" line="64"/>
         <source>Logo designed by %1</source>
         <translation>%1에 의해 설계된 로고</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="62"/>
+        <location filename="../aboutdialog.cpp" line="66"/>
         <source>Built with Qt %1 (%2)</source>
         <translation>Qt %1(%2)로 빌드됨</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="63"/>
+        <location filename="../aboutdialog.cpp" line="67"/>
         <source>Source code</source>
         <translation>소스 코드</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="73"/>
+        <location filename="../aboutdialog.cpp" line="77"/>
         <source>Contributors</source>
         <translation>기여자</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="75"/>
+        <location filename="../aboutdialog.cpp" line="79"/>
         <source>List of contributors on GitHub</source>
         <translation>GitHub의 기여자 목록</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="76"/>
+        <location filename="../aboutdialog.cpp" line="80"/>
         <source>Thanks to all people who contributed to this project.</source>
         <translation>이 프로젝트에 기여해주신 모든 분들께 감사드립니다.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="80"/>
+        <location filename="../aboutdialog.cpp" line="84"/>
         <source>Translators</source>
         <translation>번역자</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="81"/>
+        <location filename="../aboutdialog.cpp" line="85"/>
         <source>I would like to thank the following people who volunteered to translate this application.</source>
         <translation>이 응용 프로그램 번역에 자원해 주신 다음 분들께 감사의 말씀을 전합니다.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="125"/>
+        <location filename="../aboutdialog.cpp" line="129"/>
         <source>%1 is built on the following free software libraries:</source>
         <comment>Free as in freedom</comment>
         <translation>%1은 다음과 같은 무료 소프트웨어 라이브러리를 기반으로 합니다:</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="149"/>
+        <location filename="../aboutdialog.cpp" line="153"/>
         <source>&amp;Special Thanks</source>
         <translation>특별한 감사(&amp;S)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="151"/>
+        <location filename="../aboutdialog.cpp" line="155"/>
         <source>&amp;Third-party Libraries</source>
         <translation>타사 라이브러리(&amp;T)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="87"/>
+        <location filename="../aboutdialog.cpp" line="91"/>
         <source>Your Rights</source>
         <translation>사용자 권한</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="57"/>
+        <location filename="../aboutdialog.cpp" line="61"/>
         <source>Copyright (c) %1 %2</source>
         <comment>%1 is year, %2 is the name of copyright holder(s)</comment>
         <translation>저작권 (c) %1 %2</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="89"/>
+        <location filename="../aboutdialog.cpp" line="93"/>
         <source>%1 is released under the MIT License.</source>
         <translation>사용자의 권한 %1은 MIT 라이선스에 따라 릴리스됩니다.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="90"/>
+        <location filename="../aboutdialog.cpp" line="94"/>
         <source>This license grants people a number of freedoms:</source>
         <translation>이 라이선스는 다음과 같은 다양한 자유를 제공합니다:</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="91"/>
+        <location filename="../aboutdialog.cpp" line="95"/>
         <source>You are free to use %1, for any purpose</source>
         <translation>%1을(를) 어떤 용도로도 자유롭게 사용할 수 있습니다</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="92"/>
+        <location filename="../aboutdialog.cpp" line="96"/>
         <source>You are free to distribute %1</source>
         <translation>%1를 무료로 배포할 수 있습니다</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="93"/>
+        <location filename="../aboutdialog.cpp" line="97"/>
         <source>You can study how %1 works and change it</source>
         <translation>%1가 작동하는 방식을 연구하고 변경할 수 있습니다</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="94"/>
+        <location filename="../aboutdialog.cpp" line="98"/>
         <source>You can distribute changed versions of %1</source>
         <translation>변경된 버전의 %1을 배포할 수 있습니다</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="96"/>
+        <location filename="../aboutdialog.cpp" line="100"/>
         <source>The MIT license guarantees you this freedom. Nobody is ever permitted to take it away.</source>
         <translation>MIT 라이선스는 이러한 자유를 보장합니다. 누구도 이를 빼앗을 수 없습니다.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="124"/>
+        <location filename="../aboutdialog.cpp" line="128"/>
         <source>Third-party Libraries used by %1</source>
         <translation>%1에서 사용하는 타사 라이브러리</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="147"/>
+        <location filename="../aboutdialog.cpp" line="151"/>
         <source>&amp;Help</source>
         <translation>도움말(&amp;H)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="148"/>
+        <location filename="../aboutdialog.cpp" line="152"/>
         <source>&amp;About</source>
         <translation>정보(&amp;A)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="150"/>
+        <location filename="../aboutdialog.cpp" line="154"/>
         <source>&amp;License</source>
         <translation>라이선스(&amp;L)</translation>
     </message>
@@ -187,13 +187,13 @@
         <translation type="vanished">파일 URL 목록이 비어 있습니다</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="51"/>
+        <location filename="../graphicsview.cpp" line="52"/>
         <source>File is not a valid image</source>
         <translation>파일이 올바른 이미지가 아닙니다</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="55"/>
-        <location filename="../graphicsview.cpp" line="59"/>
+        <location filename="../graphicsview.cpp" line="56"/>
+        <location filename="../graphicsview.cpp" line="60"/>
         <source>Image data is invalid or currently unsupported</source>
         <translation>이미지 데이터가 잘못되었거나 현재 지원되지 않습니다</translation>
     </message>
@@ -707,91 +707,96 @@
 <context>
     <name>SettingsDialog</name>
     <message>
-        <location filename="../settingsdialog.cpp" line="22"/>
+        <location filename="../settingsdialog.cpp" line="23"/>
         <source>Settings</source>
         <translation>설정</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="27"/>
+        <location filename="../settingsdialog.cpp" line="28"/>
         <source>Do nothing</source>
         <translation>아무것도 하지 않음</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="28"/>
+        <location filename="../settingsdialog.cpp" line="29"/>
         <source>Close the window</source>
         <translation>창 닫기</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="29"/>
+        <location filename="../settingsdialog.cpp" line="30"/>
         <source>Toggle maximize</source>
         <translation>최대화 전환</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="33"/>
+        <location filename="../settingsdialog.cpp" line="34"/>
         <source>Zoom in and out</source>
         <translation>확대 및 축소</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="34"/>
+        <location filename="../settingsdialog.cpp" line="35"/>
         <source>View next or previous item</source>
         <translation>다음 또는 이전 항목 보기</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="38"/>
+        <location filename="../settingsdialog.cpp" line="39"/>
         <source>Auto size</source>
         <translation>자동 크기</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="39"/>
+        <location filename="../settingsdialog.cpp" line="40"/>
         <source>Maximized</source>
         <translation>최대화</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="43"/>
+        <location filename="../settingsdialog.cpp" line="44"/>
         <source>Round (Integer scaling)</source>
         <comment>This option means round up for .5 and above</comment>
         <translation>라운드 (정수 스케일링)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="44"/>
+        <location filename="../settingsdialog.cpp" line="45"/>
         <source>Ceil (Integer scaling)</source>
         <comment>This option means always round up</comment>
         <translation>셰일 (정수 스케일링)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="45"/>
+        <location filename="../settingsdialog.cpp" line="46"/>
         <source>Floor (Integer scaling)</source>
         <comment>This option means always round down</comment>
         <translation>바닥 (정수 스케일링)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="46"/>
+        <location filename="../settingsdialog.cpp" line="47"/>
         <source>Follow system (Fractional scaling)</source>
         <comment>This option means don&apos;t round</comment>
         <translation>팔로우 시스템 (부분 스케일링)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="69"/>
+        <location filename="../settingsdialog.cpp" line="70"/>
         <source>Stay on top when start-up</source>
         <translation>시작 시 맨 위에 유지</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="70"/>
+        <location filename="../settingsdialog.cpp" line="71"/>
+        <source>Use light-color checkerboard</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../settingsdialog.cpp" line="72"/>
         <source>Double-click behavior</source>
         <translation>더블클릭 동작</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="71"/>
+        <location filename="../settingsdialog.cpp" line="73"/>
         <source>Mouse wheel behavior</source>
         <translation>마우스 휠 동작</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="72"/>
+        <location filename="../settingsdialog.cpp" line="74"/>
         <source>Default window size</source>
         <translation>기본 창 크기</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="73"/>
+        <location filename="../settingsdialog.cpp" line="75"/>
         <source>HiDPI scale factor rounding policy</source>
         <translation>HiDPI 배율 반올림 정책</translation>
     </message>
@@ -804,12 +809,12 @@
         <translation>파인애플 픽처스</translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="44"/>
+        <location filename="../main.cpp" line="45"/>
         <source>List supported image format suffixes, and quit program.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="48"/>
+        <location filename="../main.cpp" line="49"/>
         <source>File list.</source>
         <translation>파일 목록.</translation>
     </message>

app/translations/PineapplePictures_nb_NO.ts

@@ -39,7 +39,7 @@
         <translation>Unngå lukking av vinduet ved feiltagelser (f.eks. ved dobbeltklikking av vinduet)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="54"/>
+        <location filename="../aboutdialog.cpp" line="53"/>
         <source>Version: %1</source>
         <translation>Versjon: %1</translation>
     </message>
@@ -48,63 +48,63 @@
         <translation type="vanished">Opphavsrett © 2020 %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="60"/>
+        <location filename="../aboutdialog.cpp" line="64"/>
         <source>Logo designed by %1</source>
         <translation>Logo designet av %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="62"/>
+        <location filename="../aboutdialog.cpp" line="66"/>
         <source>Built with Qt %1 (%2)</source>
         <translation>Bygd med Qt %1 (%2)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="63"/>
+        <location filename="../aboutdialog.cpp" line="67"/>
         <source>Source code</source>
         <translation>Kildekode</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="73"/>
+        <location filename="../aboutdialog.cpp" line="77"/>
         <source>Contributors</source>
         <translation>Bidragsytere</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="75"/>
+        <location filename="../aboutdialog.cpp" line="79"/>
         <source>List of contributors on GitHub</source>
         <translation>Liste over bidragsytere på GitHub</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="76"/>
+        <location filename="../aboutdialog.cpp" line="80"/>
         <source>Thanks to all people who contributed to this project.</source>
         <translation>Takk til alle som har bidratt til prosjektet.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="80"/>
+        <location filename="../aboutdialog.cpp" line="84"/>
         <source>Translators</source>
         <translation>Oversettere</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="81"/>
+        <location filename="../aboutdialog.cpp" line="85"/>
         <source>I would like to thank the following people who volunteered to translate this application.</source>
         <translation>Takk til følgende dugnadsoversettere.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="125"/>
+        <location filename="../aboutdialog.cpp" line="129"/>
         <source>%1 is built on the following free software libraries:</source>
         <comment>Free as in freedom</comment>
         <translation type="unfinished">%1 er bygd med følgende friprog-bibliotek:</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="149"/>
+        <location filename="../aboutdialog.cpp" line="153"/>
         <source>&amp;Special Thanks</source>
         <translation>&amp;Spesiell takk til</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="151"/>
+        <location filename="../aboutdialog.cpp" line="155"/>
         <source>&amp;Third-party Libraries</source>
         <translation>&amp;Tredjepartslisenser</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="87"/>
+        <location filename="../aboutdialog.cpp" line="91"/>
         <source>Your Rights</source>
         <translation>Dine rettigheter</translation>
     </message>
@@ -114,63 +114,63 @@
         <translation>Unngå å tilbakestille tilstanden for zoom/rotasjon/speilvending som ble brukt på bildevisningen, når det skiftes mellom bilder.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="57"/>
+        <location filename="../aboutdialog.cpp" line="61"/>
         <source>Copyright (c) %1 %2</source>
         <comment>%1 is year, %2 is the name of copyright holder(s)</comment>
         <translation type="unfinished">Opphavsrett © %1 %2</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="89"/>
+        <location filename="../aboutdialog.cpp" line="93"/>
         <source>%1 is released under the MIT License.</source>
         <translation>%1 er MIT-lisensiert.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="90"/>
+        <location filename="../aboutdialog.cpp" line="94"/>
         <source>This license grants people a number of freedoms:</source>
         <translation>Lisensen gir den en rekke friheter:</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="91"/>
+        <location filename="../aboutdialog.cpp" line="95"/>
         <source>You are free to use %1, for any purpose</source>
         <translation>Du kan bruke %1 som du vil</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="92"/>
+        <location filename="../aboutdialog.cpp" line="96"/>
         <source>You are free to distribute %1</source>
         <translation>Du kan dele %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="93"/>
+        <location filename="../aboutdialog.cpp" line="97"/>
         <source>You can study how %1 works and change it</source>
         <translation>Du kan se kildekoden til %1 og endre den</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="94"/>
+        <location filename="../aboutdialog.cpp" line="98"/>
         <source>You can distribute changed versions of %1</source>
         <translation>Du kan distribuere endrede versjoner av %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="96"/>
+        <location filename="../aboutdialog.cpp" line="100"/>
         <source>The MIT license guarantees you this freedom. Nobody is ever permitted to take it away.</source>
         <translation>MIT-lisensen garanterer deg disse frihetene.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="124"/>
+        <location filename="../aboutdialog.cpp" line="128"/>
         <source>Third-party Libraries used by %1</source>
         <translation>Tredjepartsbibliotek brukt av %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="147"/>
+        <location filename="../aboutdialog.cpp" line="151"/>
         <source>&amp;Help</source>
         <translation>&amp;Hjelp</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="148"/>
+        <location filename="../aboutdialog.cpp" line="152"/>
         <source>&amp;About</source>
         <translation>&amp;Om</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="150"/>
+        <location filename="../aboutdialog.cpp" line="154"/>
         <source>&amp;License</source>
         <translation>&amp;Lisens</translation>
     </message>
@@ -191,13 +191,13 @@
         <translation type="vanished">Listen over filnettadresser er tom</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="51"/>
+        <location filename="../graphicsview.cpp" line="52"/>
         <source>File is not a valid image</source>
         <translation>Filen er ikke et gyldig bilde</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="55"/>
-        <location filename="../graphicsview.cpp" line="59"/>
+        <location filename="../graphicsview.cpp" line="56"/>
+        <location filename="../graphicsview.cpp" line="60"/>
         <source>Image data is invalid or currently unsupported</source>
         <translation>Ugyldig bildedata, eller for tiden ustøttet</translation>
     </message>
@@ -711,91 +711,96 @@
 <context>
     <name>SettingsDialog</name>
     <message>
-        <location filename="../settingsdialog.cpp" line="22"/>
+        <location filename="../settingsdialog.cpp" line="23"/>
         <source>Settings</source>
         <translation>Innstillinger</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="27"/>
+        <location filename="../settingsdialog.cpp" line="28"/>
         <source>Do nothing</source>
         <translation>Ikke gjør noe</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="28"/>
+        <location filename="../settingsdialog.cpp" line="29"/>
         <source>Close the window</source>
         <translation>Lukk vinduet</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="29"/>
+        <location filename="../settingsdialog.cpp" line="30"/>
         <source>Toggle maximize</source>
         <translation>Maksimering av/på</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="33"/>
+        <location filename="../settingsdialog.cpp" line="34"/>
         <source>Zoom in and out</source>
         <translation>Zoom inn og ut</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="34"/>
+        <location filename="../settingsdialog.cpp" line="35"/>
         <source>View next or previous item</source>
         <translation>Vis neste eller forrige element</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="38"/>
+        <location filename="../settingsdialog.cpp" line="39"/>
         <source>Auto size</source>
         <translation type="unfinished">Automatisk størrelse</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="39"/>
+        <location filename="../settingsdialog.cpp" line="40"/>
         <source>Maximized</source>
         <translation>Maksimert</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="43"/>
+        <location filename="../settingsdialog.cpp" line="44"/>
         <source>Round (Integer scaling)</source>
         <comment>This option means round up for .5 and above</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="44"/>
+        <location filename="../settingsdialog.cpp" line="45"/>
         <source>Ceil (Integer scaling)</source>
         <comment>This option means always round up</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="45"/>
+        <location filename="../settingsdialog.cpp" line="46"/>
         <source>Floor (Integer scaling)</source>
         <comment>This option means always round down</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="46"/>
+        <location filename="../settingsdialog.cpp" line="47"/>
         <source>Follow system (Fractional scaling)</source>
         <comment>This option means don&apos;t round</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="69"/>
+        <location filename="../settingsdialog.cpp" line="70"/>
         <source>Stay on top when start-up</source>
         <translation>Behold i forgrunnen ved oppstart</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="70"/>
+        <location filename="../settingsdialog.cpp" line="71"/>
+        <source>Use light-color checkerboard</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../settingsdialog.cpp" line="72"/>
         <source>Double-click behavior</source>
         <translation>Dobbeltklikksoppførsel</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="71"/>
+        <location filename="../settingsdialog.cpp" line="73"/>
         <source>Mouse wheel behavior</source>
         <translation>Musehjulsoppførsel</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="72"/>
+        <location filename="../settingsdialog.cpp" line="74"/>
         <source>Default window size</source>
         <translation>Forvalgt vindusstørrelse</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="73"/>
+        <location filename="../settingsdialog.cpp" line="75"/>
         <source>HiDPI scale factor rounding policy</source>
         <translation type="unfinished"></translation>
     </message>
@@ -808,12 +813,12 @@
         <translation>Pineapple Pictures</translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="44"/>
+        <location filename="../main.cpp" line="45"/>
         <source>List supported image format suffixes, and quit program.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="48"/>
+        <location filename="../main.cpp" line="49"/>
         <source>File list.</source>
         <translation>Filliste.</translation>
     </message>

app/translations/PineapplePictures_nl.ts

@@ -39,7 +39,7 @@
         <translation>Voorkomt per ongeluk sluiten (bijv. door te dubbelklikken op het venster).</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="54"/>
+        <location filename="../aboutdialog.cpp" line="53"/>
         <source>Version: %1</source>
         <translation>Versie: %1</translation>
     </message>
@@ -48,63 +48,63 @@
         <translation type="vanished">Copyright (c) 2020 %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="60"/>
+        <location filename="../aboutdialog.cpp" line="64"/>
         <source>Logo designed by %1</source>
         <translation>Logo gemaakt door %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="62"/>
+        <location filename="../aboutdialog.cpp" line="66"/>
         <source>Built with Qt %1 (%2)</source>
         <translation>Gebouwd met Qt %1 (%2)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="63"/>
+        <location filename="../aboutdialog.cpp" line="67"/>
         <source>Source code</source>
         <translation>Broncode</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="73"/>
+        <location filename="../aboutdialog.cpp" line="77"/>
         <source>Contributors</source>
         <translation>Bijdragers</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="75"/>
+        <location filename="../aboutdialog.cpp" line="79"/>
         <source>List of contributors on GitHub</source>
         <translation>Lijst met bijdragers op GitHub</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="76"/>
+        <location filename="../aboutdialog.cpp" line="80"/>
         <source>Thanks to all people who contributed to this project.</source>
         <translation>Met dank aan alle personen die hebben bijgedragen aan dit project.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="80"/>
+        <location filename="../aboutdialog.cpp" line="84"/>
         <source>Translators</source>
         <translation>Vertalers</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="81"/>
+        <location filename="../aboutdialog.cpp" line="85"/>
         <source>I would like to thank the following people who volunteered to translate this application.</source>
         <translation>Ik wil graag de volgende mensen bedanken die vrijwillig hebben bijgedragen aan vertalingen.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="125"/>
+        <location filename="../aboutdialog.cpp" line="129"/>
         <source>%1 is built on the following free software libraries:</source>
         <comment>Free as in freedom</comment>
         <translation>%1 is gebouwd met de volgende vrijesoftwarebibliotheken:</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="149"/>
+        <location filename="../aboutdialog.cpp" line="153"/>
         <source>&amp;Special Thanks</source>
         <translation>&amp;Met dank aan</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="151"/>
+        <location filename="../aboutdialog.cpp" line="155"/>
         <source>&amp;Third-party Libraries</source>
         <translation>Ex&amp;terne bibliotheken</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="87"/>
+        <location filename="../aboutdialog.cpp" line="91"/>
         <source>Your Rights</source>
         <translation>Uw rechten</translation>
     </message>
@@ -114,63 +114,63 @@
         <translation>Voorkom dat het zoomniveau, de draaiing en spiegeling worden hersteld na wisselen van afbeelding.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="57"/>
+        <location filename="../aboutdialog.cpp" line="61"/>
         <source>Copyright (c) %1 %2</source>
         <comment>%1 is year, %2 is the name of copyright holder(s)</comment>
         <translation>Copyright (c) %1 %2</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="89"/>
+        <location filename="../aboutdialog.cpp" line="93"/>
         <source>%1 is released under the MIT License.</source>
         <translation>%1 is uitgebracht onder de MIT-licentie.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="90"/>
+        <location filename="../aboutdialog.cpp" line="94"/>
         <source>This license grants people a number of freedoms:</source>
         <translation>Deze licentie biedt een hoop vrijheden:</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="91"/>
+        <location filename="../aboutdialog.cpp" line="95"/>
         <source>You are free to use %1, for any purpose</source>
         <translation>U mag %1 gratis gebruiken, voor welk doeleinde dan ook</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="92"/>
+        <location filename="../aboutdialog.cpp" line="96"/>
         <source>You are free to distribute %1</source>
         <translation>U mag %1 vrij verspreiden</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="93"/>
+        <location filename="../aboutdialog.cpp" line="97"/>
         <source>You can study how %1 works and change it</source>
         <translation>U kunt bekijken hoe %1 werkt en aanpassingen doen</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="94"/>
+        <location filename="../aboutdialog.cpp" line="98"/>
         <source>You can distribute changed versions of %1</source>
         <translation>U mag aangepaste versie van %1 vrij verspreiden</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="96"/>
+        <location filename="../aboutdialog.cpp" line="100"/>
         <source>The MIT license guarantees you this freedom. Nobody is ever permitted to take it away.</source>
         <translation>De MIT-licentie garandeert u deze vrijheid, en niemand mag deze vrijheid wegnemen.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="124"/>
+        <location filename="../aboutdialog.cpp" line="128"/>
         <source>Third-party Libraries used by %1</source>
         <translation>Door %1 gebruikte externe bibliotheken</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="147"/>
+        <location filename="../aboutdialog.cpp" line="151"/>
         <source>&amp;Help</source>
         <translation>&amp;Hulp</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="148"/>
+        <location filename="../aboutdialog.cpp" line="152"/>
         <source>&amp;About</source>
         <translation>&amp;Over</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="150"/>
+        <location filename="../aboutdialog.cpp" line="154"/>
         <source>&amp;License</source>
         <translation>&amp;Licentie</translation>
     </message>
@@ -191,13 +191,13 @@
         <translation type="vanished">De bestandspadlijst is leeg</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="51"/>
+        <location filename="../graphicsview.cpp" line="52"/>
         <source>File is not a valid image</source>
         <translation>Het bestand is geen afbeelding</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="55"/>
-        <location filename="../graphicsview.cpp" line="59"/>
+        <location filename="../graphicsview.cpp" line="56"/>
+        <location filename="../graphicsview.cpp" line="60"/>
         <source>Image data is invalid or currently unsupported</source>
         <translation>De afbeeldingsgegevens zijn beschadigd of worden niet ondersteund</translation>
     </message>
@@ -711,91 +711,96 @@
 <context>
     <name>SettingsDialog</name>
     <message>
-        <location filename="../settingsdialog.cpp" line="22"/>
+        <location filename="../settingsdialog.cpp" line="23"/>
         <source>Settings</source>
         <translation>Instellingen</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="27"/>
+        <location filename="../settingsdialog.cpp" line="28"/>
         <source>Do nothing</source>
         <translation>Niets doen</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="28"/>
+        <location filename="../settingsdialog.cpp" line="29"/>
         <source>Close the window</source>
         <translation>Venster sluiten</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="29"/>
+        <location filename="../settingsdialog.cpp" line="30"/>
         <source>Toggle maximize</source>
         <translation>Maximaliseren/Demaximaliseren</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="33"/>
+        <location filename="../settingsdialog.cpp" line="34"/>
         <source>Zoom in and out</source>
         <translation>In-/Uitzoomen</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="34"/>
+        <location filename="../settingsdialog.cpp" line="35"/>
         <source>View next or previous item</source>
         <translation>Ga naar volgende of vorige item</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="38"/>
+        <location filename="../settingsdialog.cpp" line="39"/>
         <source>Auto size</source>
         <translation>Automatische grootte</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="39"/>
+        <location filename="../settingsdialog.cpp" line="40"/>
         <source>Maximized</source>
         <translation>Gemaximaliseerd</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="43"/>
+        <location filename="../settingsdialog.cpp" line="44"/>
         <source>Round (Integer scaling)</source>
         <comment>This option means round up for .5 and above</comment>
         <translation>Rond (geheel getal)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="44"/>
+        <location filename="../settingsdialog.cpp" line="45"/>
         <source>Ceil (Integer scaling)</source>
         <comment>This option means always round up</comment>
         <translation>Keil (geheel getal)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="45"/>
+        <location filename="../settingsdialog.cpp" line="46"/>
         <source>Floor (Integer scaling)</source>
         <comment>This option means always round down</comment>
         <translation>Grond (geheel getal)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="46"/>
+        <location filename="../settingsdialog.cpp" line="47"/>
         <source>Follow system (Fractional scaling)</source>
         <comment>This option means don&apos;t round</comment>
         <translation>Systeeminstelling (fractionele schaal)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="69"/>
+        <location filename="../settingsdialog.cpp" line="70"/>
         <source>Stay on top when start-up</source>
         <translation>Automatisch altijd bovenop</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="70"/>
+        <location filename="../settingsdialog.cpp" line="71"/>
+        <source>Use light-color checkerboard</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../settingsdialog.cpp" line="72"/>
         <source>Double-click behavior</source>
         <translation>Dubbelklikgedrag</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="71"/>
+        <location filename="../settingsdialog.cpp" line="73"/>
         <source>Mouse wheel behavior</source>
         <translation>Scrollwielgedrag</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="72"/>
+        <location filename="../settingsdialog.cpp" line="74"/>
         <source>Default window size</source>
         <translation>Standaard vensterafmetingen</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="73"/>
+        <location filename="../settingsdialog.cpp" line="75"/>
         <source>HiDPI scale factor rounding policy</source>
         <translation>HiDPI-schaalfactor - afrondbeleid</translation>
     </message>
@@ -808,12 +813,12 @@
         <translation>Pineapple Afbeeldingen</translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="44"/>
+        <location filename="../main.cpp" line="45"/>
         <source>List supported image format suffixes, and quit program.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="48"/>
+        <location filename="../main.cpp" line="49"/>
         <source>File list.</source>
         <translation>Bestandslijst.</translation>
     </message>

app/translations/PineapplePictures_pa_PK.ts

@@ -44,129 +44,129 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="54"/>
+        <location filename="../aboutdialog.cpp" line="53"/>
         <source>Version: %1</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="60"/>
+        <location filename="../aboutdialog.cpp" line="64"/>
         <source>Logo designed by %1</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="62"/>
+        <location filename="../aboutdialog.cpp" line="66"/>
         <source>Built with Qt %1 (%2)</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="63"/>
+        <location filename="../aboutdialog.cpp" line="67"/>
         <source>Source code</source>
         <translation>سروت دا کوڈ</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="73"/>
+        <location filename="../aboutdialog.cpp" line="77"/>
         <source>Contributors</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="75"/>
+        <location filename="../aboutdialog.cpp" line="79"/>
         <source>List of contributors on GitHub</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="76"/>
+        <location filename="../aboutdialog.cpp" line="80"/>
         <source>Thanks to all people who contributed to this project.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="80"/>
+        <location filename="../aboutdialog.cpp" line="84"/>
         <source>Translators</source>
         <translation>ترجمے والے</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="81"/>
+        <location filename="../aboutdialog.cpp" line="85"/>
         <source>I would like to thank the following people who volunteered to translate this application.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="125"/>
+        <location filename="../aboutdialog.cpp" line="129"/>
         <source>%1 is built on the following free software libraries:</source>
         <comment>Free as in freedom</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="149"/>
+        <location filename="../aboutdialog.cpp" line="153"/>
         <source>&amp;Special Thanks</source>
         <translation>شکریئے</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="151"/>
+        <location filename="../aboutdialog.cpp" line="155"/>
         <source>&amp;Third-party Libraries</source>
         <translation>تیجی پارٹی سوفٹویر</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="87"/>
+        <location filename="../aboutdialog.cpp" line="91"/>
         <source>Your Rights</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="57"/>
+        <location filename="../aboutdialog.cpp" line="61"/>
         <source>Copyright (c) %1 %2</source>
         <comment>%1 is year, %2 is the name of copyright holder(s)</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="89"/>
+        <location filename="../aboutdialog.cpp" line="93"/>
         <source>%1 is released under the MIT License.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="90"/>
+        <location filename="../aboutdialog.cpp" line="94"/>
         <source>This license grants people a number of freedoms:</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="91"/>
+        <location filename="../aboutdialog.cpp" line="95"/>
         <source>You are free to use %1, for any purpose</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="92"/>
+        <location filename="../aboutdialog.cpp" line="96"/>
         <source>You are free to distribute %1</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="93"/>
+        <location filename="../aboutdialog.cpp" line="97"/>
         <source>You can study how %1 works and change it</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="94"/>
+        <location filename="../aboutdialog.cpp" line="98"/>
         <source>You can distribute changed versions of %1</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="96"/>
+        <location filename="../aboutdialog.cpp" line="100"/>
         <source>The MIT license guarantees you this freedom. Nobody is ever permitted to take it away.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="124"/>
+        <location filename="../aboutdialog.cpp" line="128"/>
         <source>Third-party Libraries used by %1</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="147"/>
+        <location filename="../aboutdialog.cpp" line="151"/>
         <source>&amp;Help</source>
         <translation>مدد</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="148"/>
+        <location filename="../aboutdialog.cpp" line="152"/>
         <source>&amp;About</source>
         <translation>بارے</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="150"/>
+        <location filename="../aboutdialog.cpp" line="154"/>
         <source>&amp;License</source>
         <translation>لائیسنس</translation>
     </message>
@@ -183,13 +183,13 @@
 <context>
     <name>GraphicsView</name>
     <message>
-        <location filename="../graphicsview.cpp" line="51"/>
+        <location filename="../graphicsview.cpp" line="52"/>
         <source>File is not a valid image</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="55"/>
-        <location filename="../graphicsview.cpp" line="59"/>
+        <location filename="../graphicsview.cpp" line="56"/>
+        <location filename="../graphicsview.cpp" line="60"/>
         <source>Image data is invalid or currently unsupported</source>
         <translation type="unfinished"></translation>
     </message>
@@ -695,91 +695,96 @@
 <context>
     <name>SettingsDialog</name>
     <message>
-        <location filename="../settingsdialog.cpp" line="22"/>
+        <location filename="../settingsdialog.cpp" line="23"/>
         <source>Settings</source>
         <translation>سیٹنگاں</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="27"/>
+        <location filename="../settingsdialog.cpp" line="28"/>
         <source>Do nothing</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="28"/>
+        <location filename="../settingsdialog.cpp" line="29"/>
         <source>Close the window</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="29"/>
+        <location filename="../settingsdialog.cpp" line="30"/>
         <source>Toggle maximize</source>
         <translation type="unfinished">ودھو ودھ بدلو</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="33"/>
+        <location filename="../settingsdialog.cpp" line="34"/>
         <source>Zoom in and out</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="34"/>
+        <location filename="../settingsdialog.cpp" line="35"/>
         <source>View next or previous item</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="38"/>
+        <location filename="../settingsdialog.cpp" line="39"/>
         <source>Auto size</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="39"/>
+        <location filename="../settingsdialog.cpp" line="40"/>
         <source>Maximized</source>
         <translation>ودھ توں ودھ</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="43"/>
+        <location filename="../settingsdialog.cpp" line="44"/>
         <source>Round (Integer scaling)</source>
         <comment>This option means round up for .5 and above</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="44"/>
+        <location filename="../settingsdialog.cpp" line="45"/>
         <source>Ceil (Integer scaling)</source>
         <comment>This option means always round up</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="45"/>
+        <location filename="../settingsdialog.cpp" line="46"/>
         <source>Floor (Integer scaling)</source>
         <comment>This option means always round down</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="46"/>
+        <location filename="../settingsdialog.cpp" line="47"/>
         <source>Follow system (Fractional scaling)</source>
         <comment>This option means don&apos;t round</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="69"/>
+        <location filename="../settingsdialog.cpp" line="70"/>
         <source>Stay on top when start-up</source>
         <translation type="unfinished"></translation>
     </message>
-    <message>
-        <location filename="../settingsdialog.cpp" line="70"/>
-        <source>Double-click behavior</source>
-        <translation type="unfinished"></translation>
-    </message>
     <message>
         <location filename="../settingsdialog.cpp" line="71"/>
-        <source>Mouse wheel behavior</source>
+        <source>Use light-color checkerboard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../settingsdialog.cpp" line="72"/>
-        <source>Default window size</source>
+        <source>Double-click behavior</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../settingsdialog.cpp" line="73"/>
+        <source>Mouse wheel behavior</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../settingsdialog.cpp" line="74"/>
+        <source>Default window size</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../settingsdialog.cpp" line="75"/>
         <source>HiDPI scale factor rounding policy</source>
         <translation type="unfinished"></translation>
     </message>
@@ -792,12 +797,12 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="44"/>
+        <location filename="../main.cpp" line="45"/>
         <source>List supported image format suffixes, and quit program.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="48"/>
+        <location filename="../main.cpp" line="49"/>
         <source>File list.</source>
         <translation type="unfinished"></translation>
     </message>

app/translations/PineapplePictures_ru.ts

@@ -39,7 +39,7 @@
         <translation>Избегать случайного закрытия окна. (например, двойным щелчком по окну)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="54"/>
+        <location filename="../aboutdialog.cpp" line="53"/>
         <source>Version: %1</source>
         <translation>Версия: %1</translation>
     </message>
@@ -48,63 +48,63 @@
         <translation type="vanished">Авторское право (c) 2020 %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="60"/>
+        <location filename="../aboutdialog.cpp" line="64"/>
         <source>Logo designed by %1</source>
         <translation>Логотип разработан %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="62"/>
+        <location filename="../aboutdialog.cpp" line="66"/>
         <source>Built with Qt %1 (%2)</source>
         <translation>Создано с использованием Qt %1 (%2)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="63"/>
+        <location filename="../aboutdialog.cpp" line="67"/>
         <source>Source code</source>
         <translation>Исходный код</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="73"/>
+        <location filename="../aboutdialog.cpp" line="77"/>
         <source>Contributors</source>
         <translation>Участники</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="75"/>
+        <location filename="../aboutdialog.cpp" line="79"/>
         <source>List of contributors on GitHub</source>
         <translation>Список участников на GitHub</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="76"/>
+        <location filename="../aboutdialog.cpp" line="80"/>
         <source>Thanks to all people who contributed to this project.</source>
         <translation>Спасибо всем, кто внес свой вклад в этот проект.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="80"/>
+        <location filename="../aboutdialog.cpp" line="84"/>
         <source>Translators</source>
         <translation>Переводчики</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="81"/>
+        <location filename="../aboutdialog.cpp" line="85"/>
         <source>I would like to thank the following people who volunteered to translate this application.</source>
         <translation>Я бы хотел поблагодарить следующих людей, которые приняли участие в переводе этого приложения.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="125"/>
+        <location filename="../aboutdialog.cpp" line="129"/>
         <source>%1 is built on the following free software libraries:</source>
         <comment>Free as in freedom</comment>
         <translation>%1 создан на следующих бесплатных библиотеках программного обеспечения:</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="149"/>
+        <location filename="../aboutdialog.cpp" line="153"/>
         <source>&amp;Special Thanks</source>
         <translation>&amp;Особая благодарность</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="151"/>
+        <location filename="../aboutdialog.cpp" line="155"/>
         <source>&amp;Third-party Libraries</source>
         <translation>&amp;Сторонние библиотеки</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="87"/>
+        <location filename="../aboutdialog.cpp" line="91"/>
         <source>Your Rights</source>
         <translation>Ваши Права</translation>
     </message>
@@ -114,63 +114,63 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="57"/>
+        <location filename="../aboutdialog.cpp" line="61"/>
         <source>Copyright (c) %1 %2</source>
         <comment>%1 is year, %2 is the name of copyright holder(s)</comment>
         <translation>Copyright (c) %1 %2</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="89"/>
+        <location filename="../aboutdialog.cpp" line="93"/>
         <source>%1 is released under the MIT License.</source>
         <translation>%1 выпущен под лицензией MIT.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="90"/>
+        <location filename="../aboutdialog.cpp" line="94"/>
         <source>This license grants people a number of freedoms:</source>
         <translation>Эта лицензия дает людям ряд свобод:</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="91"/>
+        <location filename="../aboutdialog.cpp" line="95"/>
         <source>You are free to use %1, for any purpose</source>
         <translation>Вы можете свободно использовать %1 для любых целей</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="92"/>
+        <location filename="../aboutdialog.cpp" line="96"/>
         <source>You are free to distribute %1</source>
         <translation>Вы можете свободно распространять %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="93"/>
+        <location filename="../aboutdialog.cpp" line="97"/>
         <source>You can study how %1 works and change it</source>
         <translation>Вы можете изучать, как работает %1, и изменять его</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="94"/>
+        <location filename="../aboutdialog.cpp" line="98"/>
         <source>You can distribute changed versions of %1</source>
         <translation>Вы можете распространять измененные версии %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="96"/>
+        <location filename="../aboutdialog.cpp" line="100"/>
         <source>The MIT license guarantees you this freedom. Nobody is ever permitted to take it away.</source>
         <translation>Лицензия MIT гарантирует вам эту свободу. Никому и никогда не разрешается забирать ее.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="124"/>
+        <location filename="../aboutdialog.cpp" line="128"/>
         <source>Third-party Libraries used by %1</source>
         <translation>Сторонние библиотеки, используемые %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="147"/>
+        <location filename="../aboutdialog.cpp" line="151"/>
         <source>&amp;Help</source>
         <translation>&amp;Помощь</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="148"/>
+        <location filename="../aboutdialog.cpp" line="152"/>
         <source>&amp;About</source>
         <translation>&amp;О программе</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="150"/>
+        <location filename="../aboutdialog.cpp" line="154"/>
         <source>&amp;License</source>
         <translation>&amp;Лицензия</translation>
     </message>
@@ -191,13 +191,13 @@
         <translation type="vanished">Список URL-адресов файлов пуст</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="51"/>
+        <location filename="../graphicsview.cpp" line="52"/>
         <source>File is not a valid image</source>
         <translation>Файл не является допустимым изображением</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="55"/>
-        <location filename="../graphicsview.cpp" line="59"/>
+        <location filename="../graphicsview.cpp" line="56"/>
+        <location filename="../graphicsview.cpp" line="60"/>
         <source>Image data is invalid or currently unsupported</source>
         <translation>Параметры изображения недействительны или не поддерживаются в настоящее время</translation>
     </message>
@@ -711,91 +711,96 @@
 <context>
     <name>SettingsDialog</name>
     <message>
-        <location filename="../settingsdialog.cpp" line="22"/>
+        <location filename="../settingsdialog.cpp" line="23"/>
         <source>Settings</source>
         <translation>Параметры</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="27"/>
+        <location filename="../settingsdialog.cpp" line="28"/>
         <source>Do nothing</source>
         <translation>Ничего не делать</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="28"/>
+        <location filename="../settingsdialog.cpp" line="29"/>
         <source>Close the window</source>
         <translation>Закрыть окно</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="29"/>
+        <location filename="../settingsdialog.cpp" line="30"/>
         <source>Toggle maximize</source>
         <translation>Переключить окно</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="33"/>
+        <location filename="../settingsdialog.cpp" line="34"/>
         <source>Zoom in and out</source>
         <translation>Увеличение и уменьшение масштаба</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="34"/>
+        <location filename="../settingsdialog.cpp" line="35"/>
         <source>View next or previous item</source>
         <translation>Следующее или предыдущее изображение</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="38"/>
+        <location filename="../settingsdialog.cpp" line="39"/>
         <source>Auto size</source>
         <translation>Авторазмер</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="39"/>
+        <location filename="../settingsdialog.cpp" line="40"/>
         <source>Maximized</source>
         <translation>Максимизировать</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="43"/>
+        <location filename="../settingsdialog.cpp" line="44"/>
         <source>Round (Integer scaling)</source>
         <comment>This option means round up for .5 and above</comment>
         <translation>Round (целочисленное масштабирование)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="44"/>
+        <location filename="../settingsdialog.cpp" line="45"/>
         <source>Ceil (Integer scaling)</source>
         <comment>This option means always round up</comment>
         <translation>Ceil (целочисленное масштабирование)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="45"/>
+        <location filename="../settingsdialog.cpp" line="46"/>
         <source>Floor (Integer scaling)</source>
         <comment>This option means always round down</comment>
         <translation>Floor (целочисленное масштабирование)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="46"/>
+        <location filename="../settingsdialog.cpp" line="47"/>
         <source>Follow system (Fractional scaling)</source>
         <comment>This option means don&apos;t round</comment>
         <translation>Следовать системе (дробное масштабирование)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="69"/>
+        <location filename="../settingsdialog.cpp" line="70"/>
         <source>Stay on top when start-up</source>
         <translation>Поверх всех окон при запуске</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="70"/>
+        <location filename="../settingsdialog.cpp" line="71"/>
+        <source>Use light-color checkerboard</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../settingsdialog.cpp" line="72"/>
         <source>Double-click behavior</source>
         <translation>Действие при двойном щелчке</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="71"/>
+        <location filename="../settingsdialog.cpp" line="73"/>
         <source>Mouse wheel behavior</source>
         <translation>Действие колеса мыши</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="72"/>
+        <location filename="../settingsdialog.cpp" line="74"/>
         <source>Default window size</source>
         <translation>Размер окна по умолчанию</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="73"/>
+        <location filename="../settingsdialog.cpp" line="75"/>
         <source>HiDPI scale factor rounding policy</source>
         <translation>Политика округления коэффициента масштабирования HiDPI</translation>
     </message>
@@ -808,12 +813,12 @@
         <translation>Pineapple Pictures</translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="44"/>
+        <location filename="../main.cpp" line="45"/>
         <source>List supported image format suffixes, and quit program.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="48"/>
+        <location filename="../main.cpp" line="49"/>
         <source>File list.</source>
         <translation>Список файлов.</translation>
     </message>

app/translations/PineapplePictures_si.ts

@@ -39,7 +39,7 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="54"/>
+        <location filename="../aboutdialog.cpp" line="53"/>
         <source>Version: %1</source>
         <translation>අනුවාදය: %1</translation>
     </message>
@@ -48,63 +48,63 @@
         <translation type="vanished">ප්‍රකාශන හිමිකම (ඇ) 2020 %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="60"/>
+        <location filename="../aboutdialog.cpp" line="64"/>
         <source>Logo designed by %1</source>
         <translation>ලාංඡනය %1 විසින් නිර්මාණය කරන ලදි</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="62"/>
+        <location filename="../aboutdialog.cpp" line="66"/>
         <source>Built with Qt %1 (%2)</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="63"/>
+        <location filename="../aboutdialog.cpp" line="67"/>
         <source>Source code</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="73"/>
+        <location filename="../aboutdialog.cpp" line="77"/>
         <source>Contributors</source>
         <translation>සහදායකයින්</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="75"/>
+        <location filename="../aboutdialog.cpp" line="79"/>
         <source>List of contributors on GitHub</source>
         <translation>ගිට්හබ් හි සහදායකයින්ගේ ලැයිස්තුව</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="76"/>
+        <location filename="../aboutdialog.cpp" line="80"/>
         <source>Thanks to all people who contributed to this project.</source>
         <translation>මෙම ව්යාපෘතියට දායක වූ සියලු දෙනාටම ස්තූතියි.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="80"/>
+        <location filename="../aboutdialog.cpp" line="84"/>
         <source>Translators</source>
         <translation>පරිවර්තකයින්</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="81"/>
+        <location filename="../aboutdialog.cpp" line="85"/>
         <source>I would like to thank the following people who volunteered to translate this application.</source>
         <translation>මෙම යෙදුම පරිවර්තනය කිරීමට ස්වේච්ඡාවෙන් ඉදිරිපත් වූ පහත සඳහන් පුද්ගලයින්ට මම ස්තූතිවන්ත වෙමි.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="125"/>
+        <location filename="../aboutdialog.cpp" line="129"/>
         <source>%1 is built on the following free software libraries:</source>
         <comment>Free as in freedom</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="149"/>
+        <location filename="../aboutdialog.cpp" line="153"/>
         <source>&amp;Special Thanks</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="151"/>
+        <location filename="../aboutdialog.cpp" line="155"/>
         <source>&amp;Third-party Libraries</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="87"/>
+        <location filename="../aboutdialog.cpp" line="91"/>
         <source>Your Rights</source>
         <translation>ඔබගේ අයිතිවාසිකම්</translation>
     </message>
@@ -114,63 +114,63 @@
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="57"/>
+        <location filename="../aboutdialog.cpp" line="61"/>
         <source>Copyright (c) %1 %2</source>
         <comment>%1 is year, %2 is the name of copyright holder(s)</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="89"/>
+        <location filename="../aboutdialog.cpp" line="93"/>
         <source>%1 is released under the MIT License.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="90"/>
+        <location filename="../aboutdialog.cpp" line="94"/>
         <source>This license grants people a number of freedoms:</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="91"/>
+        <location filename="../aboutdialog.cpp" line="95"/>
         <source>You are free to use %1, for any purpose</source>
         <translation>ඕනෑම කටයුත්තක් සඳහා %1 භාවිතා කිරීමට ඔබට නිදහස තිබේ</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="92"/>
+        <location filename="../aboutdialog.cpp" line="96"/>
         <source>You are free to distribute %1</source>
         <translation>%1 බෙදා හැරීමට ඔබට නිදහස තිබේ</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="93"/>
+        <location filename="../aboutdialog.cpp" line="97"/>
         <source>You can study how %1 works and change it</source>
         <translation>%1 ක්‍රියා කරන ආකාරය අධ්‍යයනය කර එය වෙනස් කළ හැකිය</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="94"/>
+        <location filename="../aboutdialog.cpp" line="98"/>
         <source>You can distribute changed versions of %1</source>
         <translation>%1 හි වෙනස් කළ අනුවාදයන් ඔබට බෙදා හැරීමට හැකිය</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="96"/>
+        <location filename="../aboutdialog.cpp" line="100"/>
         <source>The MIT license guarantees you this freedom. Nobody is ever permitted to take it away.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="124"/>
+        <location filename="../aboutdialog.cpp" line="128"/>
         <source>Third-party Libraries used by %1</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="147"/>
+        <location filename="../aboutdialog.cpp" line="151"/>
         <source>&amp;Help</source>
         <translation>උපකාර</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="148"/>
+        <location filename="../aboutdialog.cpp" line="152"/>
         <source>&amp;About</source>
         <translation>පිළිබඳව</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="150"/>
+        <location filename="../aboutdialog.cpp" line="154"/>
         <source>&amp;License</source>
         <translation>&amp;බලපත්‍රය</translation>
     </message>
@@ -191,13 +191,13 @@
         <translation type="obsolete">ගොනු ඒ.ස.නි. (url) ලැයිස්තුව හිස් ය</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="51"/>
+        <location filename="../graphicsview.cpp" line="52"/>
         <source>File is not a valid image</source>
         <translation>ගොනුව වලංගු නොවන රූපයකි</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="55"/>
-        <location filename="../graphicsview.cpp" line="59"/>
+        <location filename="../graphicsview.cpp" line="56"/>
+        <location filename="../graphicsview.cpp" line="60"/>
         <source>Image data is invalid or currently unsupported</source>
         <translation type="unfinished"></translation>
     </message>
@@ -707,91 +707,96 @@
 <context>
     <name>SettingsDialog</name>
     <message>
-        <location filename="../settingsdialog.cpp" line="22"/>
+        <location filename="../settingsdialog.cpp" line="23"/>
         <source>Settings</source>
         <translation>සැකසුම්</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="27"/>
+        <location filename="../settingsdialog.cpp" line="28"/>
         <source>Do nothing</source>
         <translation>කිසිවක් නොකරන්න</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="28"/>
+        <location filename="../settingsdialog.cpp" line="29"/>
         <source>Close the window</source>
         <translation>කවුළුව වහන්න</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="29"/>
+        <location filename="../settingsdialog.cpp" line="30"/>
         <source>Toggle maximize</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="33"/>
+        <location filename="../settingsdialog.cpp" line="34"/>
         <source>Zoom in and out</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="34"/>
+        <location filename="../settingsdialog.cpp" line="35"/>
         <source>View next or previous item</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="38"/>
+        <location filename="../settingsdialog.cpp" line="39"/>
         <source>Auto size</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="39"/>
+        <location filename="../settingsdialog.cpp" line="40"/>
         <source>Maximized</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="43"/>
+        <location filename="../settingsdialog.cpp" line="44"/>
         <source>Round (Integer scaling)</source>
         <comment>This option means round up for .5 and above</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="44"/>
+        <location filename="../settingsdialog.cpp" line="45"/>
         <source>Ceil (Integer scaling)</source>
         <comment>This option means always round up</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="45"/>
+        <location filename="../settingsdialog.cpp" line="46"/>
         <source>Floor (Integer scaling)</source>
         <comment>This option means always round down</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="46"/>
+        <location filename="../settingsdialog.cpp" line="47"/>
         <source>Follow system (Fractional scaling)</source>
         <comment>This option means don&apos;t round</comment>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="69"/>
+        <location filename="../settingsdialog.cpp" line="70"/>
         <source>Stay on top when start-up</source>
         <translation type="unfinished"></translation>
     </message>
-    <message>
-        <location filename="../settingsdialog.cpp" line="70"/>
-        <source>Double-click behavior</source>
-        <translation type="unfinished"></translation>
-    </message>
     <message>
         <location filename="../settingsdialog.cpp" line="71"/>
-        <source>Mouse wheel behavior</source>
+        <source>Use light-color checkerboard</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../settingsdialog.cpp" line="72"/>
-        <source>Default window size</source>
+        <source>Double-click behavior</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
         <location filename="../settingsdialog.cpp" line="73"/>
+        <source>Mouse wheel behavior</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../settingsdialog.cpp" line="74"/>
+        <source>Default window size</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../settingsdialog.cpp" line="75"/>
         <source>HiDPI scale factor rounding policy</source>
         <translation type="unfinished"></translation>
     </message>
@@ -804,12 +809,12 @@
         <translation>පයින්ඇපල් පික්චර්ස්</translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="44"/>
+        <location filename="../main.cpp" line="45"/>
         <source>List supported image format suffixes, and quit program.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="48"/>
+        <location filename="../main.cpp" line="49"/>
         <source>File list.</source>
         <translation>ගොනු ලැයිස්තුව.</translation>
     </message>

app/translations/PineapplePictures_tr.ts

@@ -39,7 +39,7 @@
         <translation>Pencereyi yanlışlıkla kapatmaktan kaçın. (örn. pencereye çift tıklayarak)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="54"/>
+        <location filename="../aboutdialog.cpp" line="53"/>
         <source>Version: %1</source>
         <translation>Sürüm: %1</translation>
     </message>
@@ -48,63 +48,63 @@
         <translation type="vanished">Telif hakkı (c) 2020 %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="60"/>
+        <location filename="../aboutdialog.cpp" line="64"/>
         <source>Logo designed by %1</source>
         <translation>Logo tasarımcısı: %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="62"/>
+        <location filename="../aboutdialog.cpp" line="66"/>
         <source>Built with Qt %1 (%2)</source>
         <translation>Qt %1 (%2) ile inşa edilmiştir</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="63"/>
+        <location filename="../aboutdialog.cpp" line="67"/>
         <source>Source code</source>
         <translation>Kaynak kodu</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="73"/>
+        <location filename="../aboutdialog.cpp" line="77"/>
         <source>Contributors</source>
         <translation>Katkıda bulunanlar</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="75"/>
+        <location filename="../aboutdialog.cpp" line="79"/>
         <source>List of contributors on GitHub</source>
         <translation>Github üzerindeki katkı sağlayıcıların listesi</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="76"/>
+        <location filename="../aboutdialog.cpp" line="80"/>
         <source>Thanks to all people who contributed to this project.</source>
         <translation>Bu projeye katkı sağlayan herkese teşekkürler.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="80"/>
+        <location filename="../aboutdialog.cpp" line="84"/>
         <source>Translators</source>
         <translation>Çevirmenler</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="81"/>
+        <location filename="../aboutdialog.cpp" line="85"/>
         <source>I would like to thank the following people who volunteered to translate this application.</source>
         <translation>Bu uygulamayı çevirmeye gönüllü olan aşağıdaki kişilere teşekkür etmek istiyorum.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="125"/>
+        <location filename="../aboutdialog.cpp" line="129"/>
         <source>%1 is built on the following free software libraries:</source>
         <comment>Free as in freedom</comment>
         <translation>%1 aşağıdaki özgür yazılım kitaplıkları üzerinde inşa edilmiştir:</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="149"/>
+        <location filename="../aboutdialog.cpp" line="153"/>
         <source>&amp;Special Thanks</source>
         <translation>Özel %Teşekkürler</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="151"/>
+        <location filename="../aboutdialog.cpp" line="155"/>
         <source>&amp;Third-party Libraries</source>
         <translation>Üçüncü Par&amp;ti Kitaplıklar</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="87"/>
+        <location filename="../aboutdialog.cpp" line="91"/>
         <source>Your Rights</source>
         <translation>Haklarınız</translation>
     </message>
@@ -114,63 +114,63 @@
         <translation>Resimler arasında geçiş yaparken resim görünümüne uygulanan yakınlaştırma/döndürme/çevirme durumu sıfırlanmasın.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="57"/>
+        <location filename="../aboutdialog.cpp" line="61"/>
         <source>Copyright (c) %1 %2</source>
         <comment>%1 is year, %2 is the name of copyright holder(s)</comment>
         <translation>Telif Hakkı (c) %1 %2</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="89"/>
+        <location filename="../aboutdialog.cpp" line="93"/>
         <source>%1 is released under the MIT License.</source>
         <translation>%1, MIT Lisansı altında sunulmuştur.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="90"/>
+        <location filename="../aboutdialog.cpp" line="94"/>
         <source>This license grants people a number of freedoms:</source>
         <translation>Bu lisans birkaç özgürlüğü kişilere veriyor:</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="91"/>
+        <location filename="../aboutdialog.cpp" line="95"/>
         <source>You are free to use %1, for any purpose</source>
         <translation>%1&apos;i herhangi bir amaç için kullanmakta özgürsünüz</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="92"/>
+        <location filename="../aboutdialog.cpp" line="96"/>
         <source>You are free to distribute %1</source>
         <translation>%1&apos;i dağıtmakta özgürsünüz</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="93"/>
+        <location filename="../aboutdialog.cpp" line="97"/>
         <source>You can study how %1 works and change it</source>
         <translation>%1&apos;in nasıl çalıştığıyla ilgili çalışabilir ve onu değiştirebilirsiniz</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="94"/>
+        <location filename="../aboutdialog.cpp" line="98"/>
         <source>You can distribute changed versions of %1</source>
         <translation>%1&apos;in değiştirilmiş sürümünü dağıtabilirsiniz</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="96"/>
+        <location filename="../aboutdialog.cpp" line="100"/>
         <source>The MIT license guarantees you this freedom. Nobody is ever permitted to take it away.</source>
         <translation>MIT lisansı özgürlüğünüzü garanti eder. Hiç kimsenin özgürlüğünüzü sizden almasına bile izin verilmez.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="124"/>
+        <location filename="../aboutdialog.cpp" line="128"/>
         <source>Third-party Libraries used by %1</source>
         <translation>%1 tarafından kullanılan Üçüncü Parti Kitaplıklar</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="147"/>
+        <location filename="../aboutdialog.cpp" line="151"/>
         <source>&amp;Help</source>
         <translation>&amp;Yardım</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="148"/>
+        <location filename="../aboutdialog.cpp" line="152"/>
         <source>&amp;About</source>
         <translation>H&amp;akkında</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="150"/>
+        <location filename="../aboutdialog.cpp" line="154"/>
         <source>&amp;License</source>
         <translation>&amp;Lisans</translation>
     </message>
@@ -191,13 +191,13 @@
         <translation type="vanished">Dosya URL listesi boş</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="51"/>
+        <location filename="../graphicsview.cpp" line="52"/>
         <source>File is not a valid image</source>
         <translation>Dosya, geçerli bir resim değil</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="55"/>
-        <location filename="../graphicsview.cpp" line="59"/>
+        <location filename="../graphicsview.cpp" line="56"/>
+        <location filename="../graphicsview.cpp" line="60"/>
         <source>Image data is invalid or currently unsupported</source>
         <translation>Resim verisi geçersiz veya şuan desteklenmiyor</translation>
     </message>
@@ -236,7 +236,7 @@
     <message>
         <location filename="../mainwindow.cpp" line="742"/>
         <source>Image From Clipboard</source>
-        <translation type="unfinished"></translation>
+        <translation>Panodaki Resim</translation>
     </message>
     <message>
         <location filename="../mainwindow.cpp" line="760"/>
@@ -300,12 +300,12 @@
     <message>
         <location filename="../actionmanager.cpp" line="106"/>
         <source>Fit to view</source>
-        <translation type="unfinished"></translation>
+        <translation>Görünüme sığdır</translation>
     </message>
     <message>
         <location filename="../actionmanager.cpp" line="107"/>
         <source>Fit to width</source>
-        <translation type="unfinished"></translation>
+        <translation>Genişliğe sığdır</translation>
     </message>
     <message>
         <location filename="../actionmanager.cpp" line="110"/>
@@ -340,7 +340,7 @@
     <message>
         <location filename="../actionmanager.cpp" line="100"/>
         <source>Rotate left</source>
-        <translation type="unfinished"></translation>
+        <translation>Sola döndür</translation>
     </message>
     <message>
         <location filename="../actionmanager.cpp" line="102"/>
@@ -711,91 +711,96 @@
 <context>
     <name>SettingsDialog</name>
     <message>
-        <location filename="../settingsdialog.cpp" line="22"/>
+        <location filename="../settingsdialog.cpp" line="23"/>
         <source>Settings</source>
         <translation>Ayarlar</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="27"/>
+        <location filename="../settingsdialog.cpp" line="28"/>
         <source>Do nothing</source>
         <translation>Hiçbir şey yapma</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="28"/>
+        <location filename="../settingsdialog.cpp" line="29"/>
         <source>Close the window</source>
         <translation>Pencereyi kapat</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="29"/>
+        <location filename="../settingsdialog.cpp" line="30"/>
         <source>Toggle maximize</source>
         <translation>Tam boyuta geç</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="33"/>
+        <location filename="../settingsdialog.cpp" line="34"/>
         <source>Zoom in and out</source>
         <translation>Yaklaştır ve uzaklaştır</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="34"/>
+        <location filename="../settingsdialog.cpp" line="35"/>
         <source>View next or previous item</source>
         <translation>Sonraki veya önceki ögeyi görüntüle</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="38"/>
+        <location filename="../settingsdialog.cpp" line="39"/>
         <source>Auto size</source>
         <translation>Otomatik boyut</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="39"/>
+        <location filename="../settingsdialog.cpp" line="40"/>
         <source>Maximized</source>
         <translation>Tam boyut</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="43"/>
+        <location filename="../settingsdialog.cpp" line="44"/>
         <source>Round (Integer scaling)</source>
         <comment>This option means round up for .5 and above</comment>
         <translation>Yuvarlak (Tamsayı ölçekleme)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="44"/>
+        <location filename="../settingsdialog.cpp" line="45"/>
         <source>Ceil (Integer scaling)</source>
         <comment>This option means always round up</comment>
         <translation>Tavan (Tamsayı ölçekleme)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="45"/>
+        <location filename="../settingsdialog.cpp" line="46"/>
         <source>Floor (Integer scaling)</source>
         <comment>This option means always round down</comment>
         <translation>Kat (Tamsayı ölçekleme)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="46"/>
+        <location filename="../settingsdialog.cpp" line="47"/>
         <source>Follow system (Fractional scaling)</source>
         <comment>This option means don&apos;t round</comment>
         <translation>Sistemi takip et (Kesirli ölçekleme)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="69"/>
+        <location filename="../settingsdialog.cpp" line="70"/>
         <source>Stay on top when start-up</source>
         <translation>Açılışta pencerelerin üstünde kal</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="70"/>
+        <location filename="../settingsdialog.cpp" line="71"/>
+        <source>Use light-color checkerboard</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../settingsdialog.cpp" line="72"/>
         <source>Double-click behavior</source>
         <translation>Çift tıklama davranışı</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="71"/>
+        <location filename="../settingsdialog.cpp" line="73"/>
         <source>Mouse wheel behavior</source>
         <translation>Fare tekeri davranışı</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="72"/>
+        <location filename="../settingsdialog.cpp" line="74"/>
         <source>Default window size</source>
         <translation>Öntanımlı pencere boyutu</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="73"/>
+        <location filename="../settingsdialog.cpp" line="75"/>
         <source>HiDPI scale factor rounding policy</source>
         <translation>HiDPI ölçek katsayısı yuvarlama ilkesi</translation>
     </message>
@@ -808,12 +813,12 @@
         <translation>Ananas Resimler</translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="44"/>
+        <location filename="../main.cpp" line="45"/>
         <source>List supported image format suffixes, and quit program.</source>
-        <translation type="unfinished"></translation>
+        <translation>Desteklenen resim biçimi son eklerini listele ve programdan çık.</translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="48"/>
+        <location filename="../main.cpp" line="49"/>
         <source>File list.</source>
         <translation>Dosya list.</translation>
     </message>

app/translations/PineapplePictures_uk.ts

@@ -44,129 +44,129 @@
         <translation>Уникати скидання стану масштабування/обертання/гортання яке було застосовано до перегляду зображення при перемиканні зображень.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="54"/>
+        <location filename="../aboutdialog.cpp" line="53"/>
         <source>Version: %1</source>
         <translation>Версія: %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="60"/>
+        <location filename="../aboutdialog.cpp" line="64"/>
         <source>Logo designed by %1</source>
         <translation>Логотип розроблено %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="62"/>
+        <location filename="../aboutdialog.cpp" line="66"/>
         <source>Built with Qt %1 (%2)</source>
         <translation>Побудований за допомогою Qt %1 (%2)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="63"/>
+        <location filename="../aboutdialog.cpp" line="67"/>
         <source>Source code</source>
         <translation>Джерельний код</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="73"/>
+        <location filename="../aboutdialog.cpp" line="77"/>
         <source>Contributors</source>
         <translation>Учасники</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="75"/>
+        <location filename="../aboutdialog.cpp" line="79"/>
         <source>List of contributors on GitHub</source>
         <translation>Список учасників на GitHub</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="76"/>
+        <location filename="../aboutdialog.cpp" line="80"/>
         <source>Thanks to all people who contributed to this project.</source>
         <translation>Дякуємо всім, хто долучився до цього проєкту.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="80"/>
+        <location filename="../aboutdialog.cpp" line="84"/>
         <source>Translators</source>
         <translation>Перекладачі</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="81"/>
+        <location filename="../aboutdialog.cpp" line="85"/>
         <source>I would like to thank the following people who volunteered to translate this application.</source>
         <translation>Я хотів би подякувати наступним людям, які прийняли участь у перекладі цього додатку.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="125"/>
+        <location filename="../aboutdialog.cpp" line="129"/>
         <source>%1 is built on the following free software libraries:</source>
         <comment>Free as in freedom</comment>
         <translation>%1 побудовано на наступних вільних бібліотеках:</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="149"/>
+        <location filename="../aboutdialog.cpp" line="153"/>
         <source>&amp;Special Thanks</source>
         <translation>&amp;Особлива подяка</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="151"/>
+        <location filename="../aboutdialog.cpp" line="155"/>
         <source>&amp;Third-party Libraries</source>
         <translation>&amp;Сторонні бібліотеки</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="87"/>
+        <location filename="../aboutdialog.cpp" line="91"/>
         <source>Your Rights</source>
         <translation>Ваші права</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="57"/>
+        <location filename="../aboutdialog.cpp" line="61"/>
         <source>Copyright (c) %1 %2</source>
         <comment>%1 is year, %2 is the name of copyright holder(s)</comment>
         <translation>Авторське право (c) %1 %2</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="89"/>
+        <location filename="../aboutdialog.cpp" line="93"/>
         <source>%1 is released under the MIT License.</source>
         <translation>%1 випускається за ліцензією MIT.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="90"/>
+        <location filename="../aboutdialog.cpp" line="94"/>
         <source>This license grants people a number of freedoms:</source>
         <translation>Ця ліцензія надає людям низку свобод:</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="91"/>
+        <location filename="../aboutdialog.cpp" line="95"/>
         <source>You are free to use %1, for any purpose</source>
         <translation>Ви можете вільно використовувати %1 для будь-яких цілей</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="92"/>
+        <location filename="../aboutdialog.cpp" line="96"/>
         <source>You are free to distribute %1</source>
         <translation>Ви можете вільно розповсюджувати %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="93"/>
+        <location filename="../aboutdialog.cpp" line="97"/>
         <source>You can study how %1 works and change it</source>
         <translation>Ви можете вивчити, як працює %1, і змінити його</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="94"/>
+        <location filename="../aboutdialog.cpp" line="98"/>
         <source>You can distribute changed versions of %1</source>
         <translation>Ви можете розповсюджувати змінені версії %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="96"/>
+        <location filename="../aboutdialog.cpp" line="100"/>
         <source>The MIT license guarantees you this freedom. Nobody is ever permitted to take it away.</source>
         <translation>Ліцензія MIT гарантує вам цю свободу. Ніхто не має права її відбирати.</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="124"/>
+        <location filename="../aboutdialog.cpp" line="128"/>
         <source>Third-party Libraries used by %1</source>
         <translation>Сторонні бібліотеки, що використовуються %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="147"/>
+        <location filename="../aboutdialog.cpp" line="151"/>
         <source>&amp;Help</source>
         <translation>&amp;Допомога</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="148"/>
+        <location filename="../aboutdialog.cpp" line="152"/>
         <source>&amp;About</source>
         <translation>&amp;Про додаток</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="150"/>
+        <location filename="../aboutdialog.cpp" line="154"/>
         <source>&amp;License</source>
         <translation>&amp;Ліцензія</translation>
     </message>
@@ -187,13 +187,13 @@
         <translation type="vanished">Список URL-адрес файлів порожній</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="51"/>
+        <location filename="../graphicsview.cpp" line="52"/>
         <source>File is not a valid image</source>
         <translation>Файл не є дійсним зображенням</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="55"/>
-        <location filename="../graphicsview.cpp" line="59"/>
+        <location filename="../graphicsview.cpp" line="56"/>
+        <location filename="../graphicsview.cpp" line="60"/>
         <source>Image data is invalid or currently unsupported</source>
         <translation>Дані зображення недійсні або наразі не підтримуються</translation>
     </message>
@@ -707,91 +707,96 @@
 <context>
     <name>SettingsDialog</name>
     <message>
-        <location filename="../settingsdialog.cpp" line="22"/>
+        <location filename="../settingsdialog.cpp" line="23"/>
         <source>Settings</source>
         <translation>Налаштування</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="27"/>
+        <location filename="../settingsdialog.cpp" line="28"/>
         <source>Do nothing</source>
         <translation>Нічого не робити</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="28"/>
+        <location filename="../settingsdialog.cpp" line="29"/>
         <source>Close the window</source>
         <translation>Закрити вікно</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="29"/>
+        <location filename="../settingsdialog.cpp" line="30"/>
         <source>Toggle maximize</source>
         <translation>Перемкнути на максимум</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="33"/>
+        <location filename="../settingsdialog.cpp" line="34"/>
         <source>Zoom in and out</source>
         <translation>Збільшення та зменшення</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="34"/>
+        <location filename="../settingsdialog.cpp" line="35"/>
         <source>View next or previous item</source>
         <translation>Переглянути наступний або попередній елемент</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="38"/>
+        <location filename="../settingsdialog.cpp" line="39"/>
         <source>Auto size</source>
         <translation>Автоматичний розмір</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="39"/>
+        <location filename="../settingsdialog.cpp" line="40"/>
         <source>Maximized</source>
         <translation>Максимізувати</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="43"/>
+        <location filename="../settingsdialog.cpp" line="44"/>
         <source>Round (Integer scaling)</source>
         <comment>This option means round up for .5 and above</comment>
         <translation>Round (цілочисельне масштабування)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="44"/>
+        <location filename="../settingsdialog.cpp" line="45"/>
         <source>Ceil (Integer scaling)</source>
         <comment>This option means always round up</comment>
         <translation>Ceil (цілочисельне масштабування)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="45"/>
+        <location filename="../settingsdialog.cpp" line="46"/>
         <source>Floor (Integer scaling)</source>
         <comment>This option means always round down</comment>
         <translation>Floor (цілочисельне масштабування)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="46"/>
+        <location filename="../settingsdialog.cpp" line="47"/>
         <source>Follow system (Fractional scaling)</source>
         <comment>This option means don&apos;t round</comment>
         <translation>Стежити за системою (дробове масштабування)</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="69"/>
+        <location filename="../settingsdialog.cpp" line="70"/>
         <source>Stay on top when start-up</source>
         <translation>Поверх всіх вікон під час запуску</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="70"/>
+        <location filename="../settingsdialog.cpp" line="71"/>
+        <source>Use light-color checkerboard</source>
+        <translation type="unfinished"></translation>
+    </message>
+    <message>
+        <location filename="../settingsdialog.cpp" line="72"/>
         <source>Double-click behavior</source>
         <translation>Поведінка при подвійному кліку</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="71"/>
+        <location filename="../settingsdialog.cpp" line="73"/>
         <source>Mouse wheel behavior</source>
         <translation>Поведінка колеса миші</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="72"/>
+        <location filename="../settingsdialog.cpp" line="74"/>
         <source>Default window size</source>
         <translation>Розмір вікна за замовчуванням</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="73"/>
+        <location filename="../settingsdialog.cpp" line="75"/>
         <source>HiDPI scale factor rounding policy</source>
         <translation>Політика округлення коефіцієнта HiDPI</translation>
     </message>
@@ -804,12 +809,12 @@
         <translation>Pineapple Pictures</translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="44"/>
+        <location filename="../main.cpp" line="45"/>
         <source>List supported image format suffixes, and quit program.</source>
         <translation type="unfinished"></translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="48"/>
+        <location filename="../main.cpp" line="49"/>
         <source>File list.</source>
         <translation>Список файлів.</translation>
     </message>

app/translations/PineapplePictures_zh_CN.ts

@@ -39,7 +39,7 @@
         <translation>避免窗口意外关闭。（如：不小心双击了窗口触发了关闭窗口行为）</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="54"/>
+        <location filename="../aboutdialog.cpp" line="53"/>
         <source>Version: %1</source>
         <translation>版本: %1</translation>
     </message>
@@ -48,63 +48,63 @@
         <translation type="vanished">版权所有 (c) 2020 %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="60"/>
+        <location filename="../aboutdialog.cpp" line="64"/>
         <source>Logo designed by %1</source>
         <translation>Logo 由 %1 设计</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="62"/>
+        <location filename="../aboutdialog.cpp" line="66"/>
         <source>Built with Qt %1 (%2)</source>
         <translation>使用 Qt %1 (%2) 进行构建</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="63"/>
+        <location filename="../aboutdialog.cpp" line="67"/>
         <source>Source code</source>
         <translation>源代码</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="73"/>
+        <location filename="../aboutdialog.cpp" line="77"/>
         <source>Contributors</source>
         <translation>贡献者</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="75"/>
+        <location filename="../aboutdialog.cpp" line="79"/>
         <source>List of contributors on GitHub</source>
         <translation>GitHub 上的贡献者列表</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="76"/>
+        <location filename="../aboutdialog.cpp" line="80"/>
         <source>Thanks to all people who contributed to this project.</source>
         <translation>感谢所有参与此项目的朋友。</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="80"/>
+        <location filename="../aboutdialog.cpp" line="84"/>
         <source>Translators</source>
         <translation>翻译者</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="81"/>
+        <location filename="../aboutdialog.cpp" line="85"/>
         <source>I would like to thank the following people who volunteered to translate this application.</source>
         <translation>我想要感谢下列自愿参与翻译此应用程序的朋友。</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="125"/>
+        <location filename="../aboutdialog.cpp" line="129"/>
         <source>%1 is built on the following free software libraries:</source>
         <comment>Free as in freedom</comment>
         <translation>%1 采用了下列自由软件程序库进行构建：</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="149"/>
+        <location filename="../aboutdialog.cpp" line="153"/>
         <source>&amp;Special Thanks</source>
         <translation>致谢(&amp;S)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="151"/>
+        <location filename="../aboutdialog.cpp" line="155"/>
         <source>&amp;Third-party Libraries</source>
         <translation>第三方程序库(&amp;T)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="87"/>
+        <location filename="../aboutdialog.cpp" line="91"/>
         <source>Your Rights</source>
         <translation>用户的权利</translation>
     </message>
@@ -114,63 +114,63 @@
         <translation>切换图片时，防止重置当前视图的缩放/旋转/翻转状态。</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="57"/>
+        <location filename="../aboutdialog.cpp" line="61"/>
         <source>Copyright (c) %1 %2</source>
         <comment>%1 is year, %2 is the name of copyright holder(s)</comment>
         <translation>版权所有 © %1 %2</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="89"/>
+        <location filename="../aboutdialog.cpp" line="93"/>
         <source>%1 is released under the MIT License.</source>
         <translation>%1 是在 MIT 许可协议下发布的。</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="90"/>
+        <location filename="../aboutdialog.cpp" line="94"/>
         <source>This license grants people a number of freedoms:</source>
         <translation>此许可证赋予人们以下自由的权利：</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="91"/>
+        <location filename="../aboutdialog.cpp" line="95"/>
         <source>You are free to use %1, for any purpose</source>
         <translation>任何人都可以为了任何目的自由地使用 %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="92"/>
+        <location filename="../aboutdialog.cpp" line="96"/>
         <source>You are free to distribute %1</source>
         <translation>任何人都可以自由地分发 %1</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="93"/>
+        <location filename="../aboutdialog.cpp" line="97"/>
         <source>You can study how %1 works and change it</source>
         <translation>任何人都可以自由地研究 %1 的工作原理并对其进行修改</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="94"/>
+        <location filename="../aboutdialog.cpp" line="98"/>
         <source>You can distribute changed versions of %1</source>
         <translation>任何人都可以自由地分发修改过的 %1 版本</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="96"/>
+        <location filename="../aboutdialog.cpp" line="100"/>
         <source>The MIT license guarantees you this freedom. Nobody is ever permitted to take it away.</source>
         <translation>此软件通过 MIT 许可证赋予用户上述自由，任何人无权剥夺。</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="124"/>
+        <location filename="../aboutdialog.cpp" line="128"/>
         <source>Third-party Libraries used by %1</source>
         <translation>%1 使用的第三方程序库</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="147"/>
+        <location filename="../aboutdialog.cpp" line="151"/>
         <source>&amp;Help</source>
         <translation>帮助(&amp;H)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="148"/>
+        <location filename="../aboutdialog.cpp" line="152"/>
         <source>&amp;About</source>
         <translation>关于(&amp;A)</translation>
     </message>
     <message>
-        <location filename="../aboutdialog.cpp" line="150"/>
+        <location filename="../aboutdialog.cpp" line="154"/>
         <source>&amp;License</source>
         <translation>软件许可证(&amp;L)</translation>
     </message>
@@ -191,13 +191,13 @@
         <translation type="vanished">文件 URL 列表为空</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="51"/>
+        <location filename="../graphicsview.cpp" line="52"/>
         <source>File is not a valid image</source>
         <translation>文件不是有效的图片文件</translation>
     </message>
     <message>
-        <location filename="../graphicsview.cpp" line="55"/>
-        <location filename="../graphicsview.cpp" line="59"/>
+        <location filename="../graphicsview.cpp" line="56"/>
+        <location filename="../graphicsview.cpp" line="60"/>
         <source>Image data is invalid or currently unsupported</source>
         <translation>图像数据无效或暂未支持</translation>
     </message>
@@ -711,91 +711,96 @@
 <context>
     <name>SettingsDialog</name>
     <message>
-        <location filename="../settingsdialog.cpp" line="22"/>
+        <location filename="../settingsdialog.cpp" line="23"/>
         <source>Settings</source>
         <translation>设定</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="27"/>
+        <location filename="../settingsdialog.cpp" line="28"/>
         <source>Do nothing</source>
         <translation>什么也不做</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="28"/>
+        <location filename="../settingsdialog.cpp" line="29"/>
         <source>Close the window</source>
         <translation>关闭窗口</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="29"/>
+        <location filename="../settingsdialog.cpp" line="30"/>
         <source>Toggle maximize</source>
         <translation>最大化窗口</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="33"/>
+        <location filename="../settingsdialog.cpp" line="34"/>
         <source>Zoom in and out</source>
         <translation>放大和缩小</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="34"/>
+        <location filename="../settingsdialog.cpp" line="35"/>
         <source>View next or previous item</source>
         <translation>查看下一项或上一项</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="38"/>
+        <location filename="../settingsdialog.cpp" line="39"/>
         <source>Auto size</source>
         <translation>自动大小</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="39"/>
+        <location filename="../settingsdialog.cpp" line="40"/>
         <source>Maximized</source>
         <translation>最大化</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="43"/>
+        <location filename="../settingsdialog.cpp" line="44"/>
         <source>Round (Integer scaling)</source>
         <comment>This option means round up for .5 and above</comment>
         <translation>四舍五入（整数缩放）</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="44"/>
+        <location filename="../settingsdialog.cpp" line="45"/>
         <source>Ceil (Integer scaling)</source>
         <comment>This option means always round up</comment>
         <translation>向上取整（整数缩放）</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="45"/>
+        <location filename="../settingsdialog.cpp" line="46"/>
         <source>Floor (Integer scaling)</source>
         <comment>This option means always round down</comment>
         <translation>向下取整（整数缩放）</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="46"/>
+        <location filename="../settingsdialog.cpp" line="47"/>
         <source>Follow system (Fractional scaling)</source>
         <comment>This option means don&apos;t round</comment>
         <translation>跟随系统（小数缩放）</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="69"/>
+        <location filename="../settingsdialog.cpp" line="70"/>
         <source>Stay on top when start-up</source>
         <translation>启动时保持窗口总在最前</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="70"/>
+        <location filename="../settingsdialog.cpp" line="71"/>
+        <source>Use light-color checkerboard</source>
+        <translation>使用亮色棋盘格</translation>
+    </message>
+    <message>
+        <location filename="../settingsdialog.cpp" line="72"/>
         <source>Double-click behavior</source>
         <translation>双击时的行为</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="71"/>
+        <location filename="../settingsdialog.cpp" line="73"/>
         <source>Mouse wheel behavior</source>
         <translation>鼠标滚轮行为</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="72"/>
+        <location filename="../settingsdialog.cpp" line="74"/>
         <source>Default window size</source>
         <translation>默认窗口大小</translation>
     </message>
     <message>
-        <location filename="../settingsdialog.cpp" line="73"/>
+        <location filename="../settingsdialog.cpp" line="75"/>
         <source>HiDPI scale factor rounding policy</source>
         <translation>HiDPI 高分屏缩放策略</translation>
     </message>
@@ -808,12 +813,12 @@
         <translation>菠萝看图</translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="44"/>
+        <location filename="../main.cpp" line="45"/>
         <source>List supported image format suffixes, and quit program.</source>
         <translation>列出所支持的图像格式扩展名，并退出程序。</translation>
     </message>
     <message>
-        <location filename="../main.cpp" line="48"/>
+        <location filename="../main.cpp" line="49"/>
         <source>File list.</source>
         <translation>文件列表。</translation>
     </message>

appveyor.yml

@@ -12,7 +12,7 @@ environment:
       QTDIR: C:\Qt\6.7\mingw_64
       MINGW64: C:\Qt\Tools\mingw1120_64
       KF_BRANCH: master
-      EXIV2_VERSION: "0.28.2"
+      EXIV2_VERSION: "0.28.3"
       EXIV2_CMAKE_OPTIONS: "-DEXIV2_ENABLE_BROTLI=OFF -DEXIV2_ENABLE_INIH=OFF -DEXIV2_BUILD_EXIV2_COMMAND=OFF"
       PPIC_CMAKE_OPTIONS: "-DPREFER_QT_5=OFF"
       WINDEPLOYQT_ARGS: "--verbose=2 --no-quick-import --no-translations --no-opengl-sw --no-system-d3d-compiler --skip-plugin-types tls,networkinformation"
@@ -67,7 +67,7 @@ build_script:
   - cd %APPVEYOR_BUILD_FOLDER%
 # install AOM for libavif AV1 decoding support...
   - cd 3rdparty
-  #- git clone -b v3.6.0 --depth 1 https://aomedia.googlesource.com/aom
+  #- git clone -b v3.9.1 --depth 1 https://aomedia.googlesource.com/aom
   #- cd aom
   #- mkdir build.aom
   #- cd build.aom
@@ -76,18 +76,18 @@ build_script:
   #- cmake --build . --config Release --target install/strip
   - mkdir aom
   - cd aom
-  - curl -fsSL -o ppkg-aom.zip https://sourceforge.net/projects/pineapple-package-manager/files/packages/mingw-w64-x86_64-windows/aom-3.6.0-1.zip
+  - curl -fsSL -o ppkg-aom.zip https://sourceforge.net/projects/pineapple-package-manager/files/packages/mingw-w64-x86_64-windows/aom-3.9.1-2.zip
   - ppkg ppkg-aom.zip
   - 7z x ppkg-aom.zip LICENSE -y
   - cd %APPVEYOR_BUILD_FOLDER%
 # install libavif for avif format support of KImageFormats
   - cd %LIBAVIF%
-  - curl -fsSL -o libavif-v0_11_1.zip https://github.com/AOMediaCodec/libavif/archive/v0.11.1.zip
-  - 7z x libavif-v0_11_1.zip -y
-  - cd libavif-0.11.1
+  - curl -fsSL -o libavif-v1_1_1.zip https://github.com/AOMediaCodec/libavif/archive/v1.1.1.zip
+  - 7z x libavif-v1_1_1.zip -y
+  - cd libavif-1.1.1
   - mkdir build
   - cd build
-  - cmake .. -G "Ninja" -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=%CMAKE_INSTALL_PREFIX% -DAVIF_CODEC_AOM=ON
+  - cmake .. -G "Ninja" -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=%CMAKE_INSTALL_PREFIX% -DAVIF_CODEC_AOM=ON -DAVIF_LOCAL_LIBYUV=ON
   - cmake --build . --config Release
   - cmake --build . --config Release --target install/strip
   - cd %APPVEYOR_BUILD_FOLDER%
@@ -104,9 +104,9 @@ build_script:
   - cd %APPVEYOR_BUILD_FOLDER%
 # build libexpat for libexiv2
   - cd %LIBEXPAT%
-  - curl -fsSL -o R_2_5_0.zip https://github.com/libexpat/libexpat/archive/R_2_5_0.zip
-  - 7z x R_2_5_0.zip -y
-  - cd libexpat-R_2_5_0/expat/
+  - curl -fsSL -o R_2_6_2.zip https://github.com/libexpat/libexpat/archive/R_2_6_2.zip
+  - 7z x R_2_6_2.zip -y
+  - cd libexpat-R_2_6_2/expat/
   - cmake -G "Ninja" . -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=%CMAKE_INSTALL_PREFIX% -DEXPAT_BUILD_EXAMPLES=OFF -DEXPAT_BUILD_TESTS=OFF -DEXPAT_BUILD_TOOLS=OFF
   - cmake --build . --target install/strip
   - cd %APPVEYOR_BUILD_FOLDER%
@@ -151,8 +151,8 @@ build_script:
   - copy %APPVEYOR_BUILD_FOLDER%\3rdparty\aom\LICENSE License.aom.txt
   - copy %APPVEYOR_BUILD_FOLDER%\3rdparty\karchive\LICENSES\LGPL-2.0-or-later.txt License.KArchive.txt
   - copy %APPVEYOR_BUILD_FOLDER%\3rdparty\kimageformats\LICENSES\LGPL-2.1-or-later.txt License.kimageformats.txt
-  - copy %LIBEXPAT%\libexpat-R_2_5_0\expat\COPYING License.expat.txt
-  - copy %LIBAVIF%\libavif-0.11.1\LICENSE License.libavif.txt
+  - copy %LIBEXPAT%\libexpat-R_2_6_2\expat\COPYING License.expat.txt
+  - copy %LIBAVIF%\libavif-1.1.1\LICENSE License.libavif.txt
   - copy %LIBEXIV2%\exiv2-%EXIV2_VERSION%\COPYING License.exiv2.txt
 # TODO: Qt, zlib
   - cd ..

dist/appstream/net.blumia.pineapple-pictures.metainfo.xml

@@ -74,6 +74,34 @@
     </screenshot>
   </screenshots>
   <releases>
+    <release type="stable" version="0.8.2.1" date="2024-10-27T00:00:00Z">
+      <description>
+        <p>This release fixes the following bug:</p>
+        <ul>
+          <li>Cannot load translations caused by a change in 0.8.2</li>
+        </ul>
+      </description>
+    </release>
+    <release type="stable" version="0.8.2" date="2024-10-26T00:00:00Z">
+      <description>
+        <p>This release adds the following feature:</p>
+        <ul>
+          <li>New option to allow use light-color checkerboard by default</li>
+        </ul>
+        <p>With contributions from:</p>
+        <p>albanobattistella, mmahhi, gallegonovato</p>
+      </description>
+    </release>
+    <release type="stable" version="0.8.1" date="2024-08-25T00:00:00Z">
+      <description>
+        <p>This release adds the following feature:</p>
+        <ul>
+          <li>New command line option to list all supported formats</li>
+        </ul>
+        <p>With contributions from:</p>
+        <p>albanobattistella, mmahhi, ovl-1, gallegonovato, Oğuz Ersen</p>
+      </description>
+    </release>
     <release type="stable" version="0.8.0" date="2024-06-29T00:00:00Z">
       <description>
         <p>This release adds the following feature:</p>

pineapple-pictures.pro

@@ -7,6 +7,7 @@ greaterThan(QT_MAJOR_VERSION, 5): QT += svgwidgets
 
 TARGET = ppic
 TEMPLATE = app
+DEFINES += PPIC_VERSION_STRING=\\\"x.y.z\\\"
 
 # The following define makes your compiler emit warnings if you use
 # any feature of Qt which has been marked as deprecated (the exact warnings