Down
Be LOW enough:
- that either heel (with an organ shoe) can play a natural pedal key without pressing your leg into the bench or leaning forward.
- that you can reach with limited stretching the lower and upper extremes of the pedal keyboard by pivoting rather than by sliding.
- that you can reach with limited stretching the expression pedal(s), the crescendo pedal (if one is present), and most of the toe studs.