gtk fonts in kde

[Ben Mulvihill]

Hello,

Does anyone know how to set the font for GTK applications in KDE?
On my laptop Qubes Manager, for example, is barely readable.
I've found a tab called "Widget Style of GNOME/GTK Applications"
in KDE Settings under "Application Style" where I can set a GTK
font, but it doesn't appear to change anything. 

I'm using Qubes 4.0

Thanks in advance.

[Ben Mulvihill]

Update:

I found one application which does respect the GTK font setting:
PulseAudio Volume Manager. There are probably more, but other GTK
applications like Firefox and Gedit ignore it.

It looks as though Qubes Manager - which I particularly struggle
with because the whole interface is tiny, not just the menus -
actually uses QT. But it ignores the KDE font settings.

[Ben Mulvihill]

Two solutions:

Given that the problem is turns out to be actually with
QT fonts, not GTK fonts, one possible solution is to
increase the DPI under System Settings / Fonts.

Alternatively, switching from Breeze to Fedora under 
Systems Settings / Workspace Theme makes Qubes Manager and
the other Qubes tools use a larger and much more readable
font.