Sorry to resurrection but this problem just cropped up out of nowhere tonight. My screen looks exactly like what the OP posted here at the start of this thread.
I haven't been using my Pro Tools 10.7.1 program since last summer and tonight when I opened it up, it looked absolutely fine and normal for the first hour or so......... then it all went to hell.
But then after clicking through a few things in the dropdown lists like Midi Editor, all of a sudden my windows font sizes were reduced to sizes so small you can hardly make out what they are. I don't know what happened here. I am running windows 10 on a pretty large monitor (not sure the size or resolution just off hand) but I never had this problem before in the year and a half that I used PT on this computer.
I tried closing PT and re-opening it, I even restarted the computer and the problem still persists.
What the heck just happened and how can I resolve it?