Tom,
A slight behavioral modification will aid you greatly. Get used to hitting the "Exit" button after each adjustment of any other function. It'll become second nature afetr a while and you wonl;t have to worry about seeing the screen from a previous entry.

Gary,
in full kb mode - LH chords will sound muddy. It's better to use a split KB if you're going to play chords with the left hand.

Boo,
What are you thinking here? Smaller, lighter?? What's the attraction?
If you want to play straight piano(both hands) to a midi file .... just turn off the acc button. It'll be off anyway during file playback, right?