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QT5OPTIONS(7) Qt Command Line Documentation QT5OPTIONS(7)

qt5options - Common commandline options for all applications based on the Qt toolkit

Qt application [-style= style /  -style style] [ -stylesheet= stylesheet /  -stylesheet  stylesheet] [-widgetcount] [-reverse] [ -qmljsdebugger= port] [-platform  platformName[:options]] [-platformpluginpath  path] [-platformtheme  platformTheme] [-plugin plugin] [-qwindowgeometry geometry] [ -qwindowicon icon] [-qwindowtitle title] [ -reverse] [-session  session] [-display hostname:screen_number] [ -geometry  geometry] [-dialogs= [xp|none]] [ -fontengine= freetype] [ -h, --help and -? on Windows] [ -v --version]

The following options apply to all Qt(TM) applications:
-style= style / -style style
Set the application GUI style. Possible values depend on the system configuration. If Qt is compiled with additional styles or has additional styles as plugins these will be available to the -style command line option.
-stylesheet= stylesheet / -stylesheet stylesheet
Set the application styleSheet. The value must be a path to a file that contains the Style Sheet.
Print debug message at the end about number of widgets left undestroyed and maximum number of widgets existed at the same time.
Set the application's layout direction to Qt::RightToLeft. This option is intended to aid debugging and should not be used in production. The default value is automatically detected from the user's locale (see also QLocale::textDirection()).
-qmljsdebugger= port
Activate the QML/JS debugger with a specified port. The value must be of format port:1234[,block], where block is optional and will make the application wait until a debugger connects to it.
-platform platformName[:options]
Specify the Qt Platform Abstraction (QPA) plugin.
-platformpluginpath path
Specify the path to platform plugins.
-platformtheme platformTheme
Specify the platform theme.
-plugin plugin
Specify additional plugins to load. The argument may appear multiple times.
-qwindowgeometry geometry
Specify the window geometry for the main window using the X11-syntax. For example: -qwindowgeometry 100x100+50+50
-qwindowicon icon
Set the default window icon.
-qwindowtitle title
Set the title of the first window.
-session session
Restore the application from an earlier session.
-display hostname:screen_number
Switch displays on X11. Overrides the DISPLAY environment variable.
-geometry geometry
Specify the window geometry for the main window on X11. For example: -geometry 100x100+50+50.
-dialogs= [xp|none]
Only available for -platform windows. xp uses XP-style native dialogs and none disables them.
-fontengine= freetype
Use the FreeType font engine.
-h, --help and -? on Windows
Print all options and the application description.
-v --version
Display the version string of the application.


Man page originally written by Lauri Watts <>
Updated to Frameworks 5 by Burkhard Lück <>
The infos for this man page are from QApplication documentation[1], QGuiApplication documentation[2] and QCommandLineParser documentation[3].

Lauri Watts <>
Burkhard Lück <>

QApplication documentation
QGuiApplication documentation
QCommandLineParser documentation
2016-06-04 KDE Frameworks Qt 5.4

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