I have an old version of Photoshop (CS5 Design Premium) and have a problem with new high resolution smonitors; I can not find a way to get the Photoshop User Interface to adjust/increase in size so that it is readable. I have tried to increase font size--does not change PS screens. What am I doing wrong?
What you're doing wrong is upgrading only part of your kit. When you get new monitors, computers, cameras, systems, expect you will need new apps. Thanks to subscription there isn't a big lump sum cost any more.