Yes this problem is from editor font change, basically anyone that has a zoom of anything besides 100 will experience this problem because font size of the editor is no longer tied to the zoom level.
We can potentially scale the font with zoom as well as the editor font setting. It’s up to you.
I too have this problem, even though I have set my zoom level back to 100 (it was previously at 130). Where is this config screen where the other mentioned font setting lives? I only can find the setting in Tools > General Options (on Mac).
Are you talking about the font size option? I’ve tried changing that number, but it doesn’t seem to actually affect the font size, which is still extremely tiny:
Yes that’s the correct one! Sorry for being unclear
Unfortunately because of the way theming is currently handled, you’ll need to restart joplin after changing the font size (or the global zoom percentage).