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

Trimming MIDI Notes with Nudge
You can trim the start and end points of selected MIDI notes by the current Nudge value.
To trim the selected MIDI notes start or end points by the Nudge value:
1 Configure the Nudge value (see Defining the Nudge Value).
2 With the Time Grabber tool, select the MIDI notes you want to trim.
3 Do one of the following:
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While pressing Alt (Windows) or Option (Mac), press Plus (+) or Minus (–) on the numeric keypad to trim the start point of the selected MIDI notes by the Nudge value.
– or – 
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While pressing Control (Windows) or Command (Mac), press Plus (+) or Minus (–) on the numeric keypad to trim the numeric keypad to trim the end point of the selected MIDI notes by the Nudge value.