I found an old thread from Chris Pavlina on this, but it got auto closed.
Using KiCAD 4.0.7 on Ubuntu 17.10, on a 15" 3840x2160 laptop display (System76 Oryx Pro / GTX 1070). Toolbar icons are pretty tiny.
I wanted to ask if this issue is currently getting any development attention. Would be happy to engage if there are any alternate builds I should try or tests to do.
Yes, it’s been taken care of and will be part of the upcoming 5.0. You can choose to enlarge the icons with some setting, I don’t remember which one. The icons aren’t scalable ATM so they may look a bit ugly.