Thanks for the advice. I gave it a try, and it didn't seem to have an effect, so, sadly I don't think that's it. I did play with scaling as well, and that didn't really help much beyond enlarging the pane to fit the text a little bit better.

Graphics actually appear fine for buttons, it's just the text on them and labels that runs way larger than everything around it and isn't actually in proper proportion. So unfortunately I'm not so sure CCP is really fully functional on a 4k screen, though it's at least suitable for editing the macros and button mappings, even rearranging UI objects, but it would be nightmarish for actually designing UI pages....that'll have to be done on an external monitor I guess.

Slightly surprised there's not another post on this topic somewhere. I can't be the only one using HT design software on a 4k display :P Woe is the installer that shows up with a Thinkpad T60 with serial and parallel ports on the back :P