Preset preview playback speed
Back in the 1980's when I first started editing on 3/4", we had buttons for half speed, full speed and 2x speed playback forward or reverse. I'd love to have a way to program a key to be whatever playback speed I want, without having to hit a long key sequence to get there. Like right now to get a slower speed forward, I have to hit [space]JJ (space bar, upper case J twice to get the speed I want.) That's fine if you do it once, but I'm going to get carpal tunnel syndrome doing it all day for a month.