I had the same question and bought a contemporary 4k monitor. Normally you simply increase the resolution (150% / 200%), but Codesys is then displayed blurred. Now I can only use my 4k monitor as 2k (2560x1440) or it gets uncomfortable.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Does anyone have experience to use codesys v3 on a 4k screen, some keys are mega small, and certain menus are the button cancel and ok not in view,
is this already a known problem?
I had the same question and bought a contemporary 4k monitor. Normally you simply increase the resolution (150% / 200%), but Codesys is then displayed blurred. Now I can only use my 4k monitor as 2k (2560x1440) or it gets uncomfortable.