Issue with hdpi and dimension of fonts

[ciobio]

I have a 13 inch hdpi monitor laptop with Kubuntu 18.04
I can't solve the problem of too small fonts on the screen.
The large fonts feature seems to not work at all.
I know it might be a Java problem but I'm not experienced enough to fix it myself.
I think it is a common problem and I would be grateful for more specific help.

Attached is a screenshot.
Thanks,
Fabio

[DNS]

If you use Windows, you can try:
Properties > Compatibility > Change high DPI settings

[ghost]

I have the following _JAVA_OPTIONS:

-Dsun.java2d.uiScale=1.35 -Dawt.useSystemAAFontSettings=on -Dswing.aatext=true -Dswing.defaultlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel -Dswing.crossplatformlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel

This is making the fonts bigger, which is good, and I can read them. But as a side-effect, not all labels fit into their designated areas on the screen, so this issue is still valid.