Thanks Brad. That is helpful. But I am looking for a way to instantly change keys on the fly several times within a song, with only one hand (while the other hand continues playing).
Is that possible with the method you described? Would I have to press System Settings (left hand) + Enter (right hand) and Exit, every time I need to transpose? Or can I just press SysSet + Enter (without Exit) once (e.g., before the song starts) and then only need to press Yes or No buttons to go up and down in key while continuing to play? In other words, do I have to press Exit to make the transposition take effect each time?
Also, even if it's safer to use the buttons, I would still like to know if it is possible to assign Transpose to a slider. Thanks.