How to change the display scale factor of Simulink interface?

Hello there,

I'm running MATLAB R2023a in Arch Linux with a HiDPI screen in 2880x1800 resolution. By default, the MATLAB interface looks small (fonts, icons, etc). This can be fixed by setting MATLAB display scale factor with the following command:

s = settings;s.matlab.desktop.DisplayScaleFactor;
s.matlab.desktop.DisplayScaleFactor.PersonalValue = 2;

After this, MATLAB interface looks perfect, shown as below:

However, the Simulink interface becomes too large, as below:

By resetting the MATLAB scale factor to 1, Simulink looks perfect but MATLAB too small.

Is there any solution to change the display scale factor of Simulink interface so that the interfaces of MATLAB ans Simulink are balanced?

Answer 1

[Alex]

It seems that Simulink is reading the environment variable QT_SCREEN_SCALE_FACTORS set by KDE and scaling according to it. But it is also scaled with s.matlab.desktop.DisplayScaleFactor.PersonalValue, therefore it is scaled twice. Unsetting this environment variable in a wrapper script when starting MATLAB makes both MATLAB and Simulink scale normally.

[Chunyu Xiao]

It works. Thank you very much!

[RayleighP]

Thanks Alex! Help me a lot!

Answer 2

[Yoga]

Hi @Chunyu Xiao!

The issue is present in the R2023a version of MATLAB.

Unfortunately, there is no workaround for this issue.

The framework of Simulink doesn't handle the DPI scale factors well.

You might want to reset the MATLAB scale factor to 1 every time you use Simulink and switch back for MATLAB as far as the R2023a version is concerned.