Examining the theme files they don't have a spot to specify a font, this is definitely a feature I would like as well.
3 years ago(+1)
I hope they implement it in the future, but for now I think I'm having a glitch/error. I uninstall it and reinstall, and it always looks like this while the screenshots of the oficial page (and in the Discord) looks like a normal font. No matter if I leave the default theme or use another, the font always looks like hollow and it's really hard to read so I'm having trouble organizing and using it overall :(( Hope they keep polishing this cuz its really a good app! (I'm in Windows)
