Questa-ModelSim UI scaling problems in Linux

Hi haris,
 

This appears to be GUI scaling under Wayland, particularly with Qt-based applications on high-DPI displays.
 

Regarding the font changes, were those made through the ~/.modelsim settings file? May I also check which Questa version you are using?
 

As a workaround, could you try launching Questa with the following commands:

export QT_SCALE_FACTOR=2

export QT_AUTO_SCREEN_SCALE_FACTOR=0

vsim
 

QT_SCALE_FACTOR=2 tells Qt to scale the application UI to 200%, which can help enlarge icons, menus, dialogs, and other GUI elements.
QT_AUTO_SCREEN_SCALE_FACTOR=0 disables Qt's automatic scaling detection and forces it to use the scale factor specified above.
 

You may need to adjust QT_SCALE_FACTOR (for example, 1.5, 2, or 2.5) depending on your display resolution and desktop scaling settings. 
 

Could you please give this workaround a try and let me know whether it improves the GUI scaling on your system.

Regards,
ZiYingE_Altera