https://bugs.kde.org/show_bug.cgi?id=421634
--- Comment #4 from Tobias Deiminger <haxti...@posteo.de> --- While I did some digging on how size is calculated, I noted my usage of QT_SCREEN_SCALE_FACTORS was wrong. Now I can't reproduce your issue any longer if I use the global QT_SCALE_FACTOR instead of QT_SCREEN_SCALE_FACTORS. $ QT_SCALE_FACTOR=1.5 okular Oliver, could you try this? As you set the same 1.5 for each screen, you could use the global parameter as well. PS: Just saw QDesktopWidget doc [1] says "This class is obsolete". Does this mean we'll have to replace QDesktopWidget in presentationwidget.cpp anyway? PPS: QDesktopWidgetPrivate::_q_updateScreens [2] gives insight on how size is calculated, basically it's the bounding rect of the QRegion union [3] of all screen geometries from QGuiApplication::screens(). [1] https://doc.qt.io/qt-5/qdesktopwidget.html [2] https://code.qt.io/cgit/qt/qtbase.git/tree/src/widgets/kernel/qdesktopwidget.cpp#n110 [3] https://doc.qt.io/qt-5/qregion.html#united -- You are receiving this mail because: You are the assignee for the bug.