Processing : Event Operations : Step Input Command : Triggering the Undo Step, Next Step, or Redo Step Buttons

Triggering the Undo Step, Next Step, or Redo Step Buttons
The Undo Step, Next Step, and Redo Step buttons can be set to be triggered by an external MIDI synth, drum pad, or other controller.
To set Undo Step, Next Step and Redo Step MIDI triggers:
1 Place the Edit insertion on a track at the location where you want to enter the first MIDI note.
2 Choose Event > Event Operations > Step Input.
3 Locate the button you want to assign a MIDI event to, and click in the field below the button.
4 Play the MIDI event you want to use as a trigger.
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If you use a continuous controller as a trigger (such as Pitch Bend), you should make certain to use an extreme controller value to avoid erroneous data input.
5 Press Enter to confirm the MIDI trigger assignment.