hello,
when I change the "text scaling", e.g. 0.8, some applications don't work anymore, e.g. MKVtoolnix.
any idea?

Which DE? Gnome, KDE, Budgie? Can you be more specific about “don’t work anymore”?

Have you tried instead to use a smaller text in the Tweaks (gnome) and Budgie settings menu instead of reducing the interface scale?

Hi,
it's on a budgie desk.
and yes, I tried to reduce the text size in the Budgie settings and it works perfectly.
by reducing the size of the interface text, the text disappears in mkvtoolnix...

I looked and it's exactly the same problem.
I tried but nothing works for me.
thank you all the same