On the Ketron products, the PIANIST MODE (Piano mode) works similar to a real piano when you use the sustain pedal.
* When you press the sustain pedal, the current chord is LOCKED allowing you to play whatever.
* When you release the pedal, the chord being played currently is taken into account ... just as a real pianist does when playing the paino.

In this case, your piano playing style doesn't change.

AJ