MIDI : MIDI Editing : Using the Grabber Tools : Transposing MIDI Notes with Nudge

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 Time Grabber tool, select the MIDI notes you want to transpose.
2 Do one of the following:
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While pressing Start (Windows) or Control (Mac), press Plus (+) on the numeric keypad transpose the selected MIDI notes up by one semitone.
– or – 
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While pressing Start (Windows) or Control (Mac), press Minus (–) on the numeric keypad transpose the selected MIDI notes down by one semitone.