What I'm encountering is that Reaper doesn't remember, on starting a new project, to turn off "Show multiple rows of tracks when space permits." When I load a defined screenset, it does turn that off. Also, it's not remembering (even on screenset load) the size of the track faders (I have them set on the left side of the screen, with the Master on the right, and also set to automatically "Scroll view when track selected) The most annoying bit is the not turning off "Show multiple rows of tracks when space permits" part. I know I had it working properly in Reaper 4, but can't remember how I did it. I also had it remembering the size (height) of my mixer faders.