I am a new user of SIL App Maker. Everything is working well except that the font on the side menu, where search, about, settings, etc., is displayed is very tiny, barely readable. I tried everything I can think of to correct it but to no avail.
Oh so this is in the app, I thought you meant in SAB itself.
In SAB what ever the Interface language is, double click on that language in the Interface section. The Text Size is set in %. Whatever is there increase it by about 20%. Then check your menu size again.