4.3.1 Resolution problem

This screenshot is from a Lenovo ThinkPad P13 (means a 13" display).
The font is extrem tiny. I don’t understand why.

I used the default font size for the table (Ctrl+0). But see in the status line: There is the text “current font size 12%”.

I can increas the font size of the table but not of the group view.

I don’t understand this situation here.

JabRef 4.* does indeed have display problems on high resolution displays. Mainly because the UI technology used dates back to the dark ages where everyone used good old CRT monitors. The most recent development version should work more gracefully in this regard, although there might still be some quirks on certain Linux systems.