Examples Included below.
Thanks you for any help.
Infotips for files:
Tooltips for toolbar buttons:
Note that the thing in your first screenshot is a context menu, not a tooltip/infotip. (We're in the process of making the font for those configurable as well.)
Thanks for replying Leo.
After using Opus for 20 years i got a 4k monitor, plus my eyesight isn't what it used to be.
Scaling in Windows display settings menu doesn't work well since it breaks many other programs UI.
I've been using Windows on a 4K monitor at 200% scaling for about 10 years now. Anything that doesn't support native DPI scaling should be pixel-doubled by the OS automatically. Not everything looks perfect but most things work OK for me.
(Ironically, the things I use the most which don't scale well are parts of the OS itself which Microsoft are too lazy to update, like Task Scheduler.)