Transposing MIDI Notes with Nudge
You can transpose selected MIDI notes by semi-tonal increments using Plus (+) or Minus (–) on the numeric keypad.
To transpose the selected MIDI notes by semitones:
1. With the Grabber tool, select the MIDI notes you want to transpose.
2. Do one of the following:

While pressing Control (Mac) or Start (Windows), press Plus (+) on the numeric keypad transpose the selected MIDI notes up by one semitone.

While pressing Control (Mac) or Start (Windows), press Minus (–) on the numeric keypad transpose the selected MIDI notes down by one semitone.