Hi there,
I have observed a UI bug on MicrobeJ where the text is tiny and cell overlays are thin at any zoom:
It is possible this is caused by using a UHD monitor at 4K resolution. I also tested at 1080p resolution and observed similar problem, possibly slightly less severe.
Tested on MicrobeJ 5.13l, FIJI 2.1.0, ImageJ 1.53c, Java 1.8.0_172.
Software remains usable, just harder for the novice especially.
Best wishes
Séamus