Editing : Editing Basics : MIDI Clips and MIDI Data : Notes View for MIDI and Instrument Tracks

Notes View for MIDI and Instrument Tracks
When a MIDI or Instrument track’s Track View is set to Notes, MIDI notes are displayed in a “piano roll” format. Each note is displayed as a small rectangle with its vertical placement indicating pitch and its horizontal placement indicating location in time (and duration).
To the left of the MIDI or Instrument track’s playlist is a vertical mini-keyboard, complete with octave numbering, for pitch reference. You can click the mini-keyboard to play pitches using the track’s selected MIDI output. Arrows at the top and bottom of the mini-keyboard (not available in the smaller track heights) are used to scroll the Notes display up and down.
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Clicking the mini-keyboard clears the current Edit selection. For more information, see Selecting MIDI Notes.
In Notes view, the pitch range of MIDI notes that can be displayed depends on the track height, and on the current zoom value. Any time a track’s notes do not fit within its current height, notes above or below the viewed area are displayed as single-pixel lines at the very top and bottom of the range.
To scroll the Notes display up or down for a MIDI or Instrument track, do one of the following:
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With any of the Edit tools (such as the Time Grabber tool) selected, press Control+Alt+Start (Windows) or Command+Option+Control (Mac) and drag up or down on the mini-keyboard.
 
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If you have a mouse with a scroll wheel, move the cursor over the track and Control-Alt-Start-scroll (Windows) or Command-Option-Control-scroll (Mac) up or down to scroll the notes display up or down.
Using the Edit tools, notes can be inserted, deleted, transposed, trimmed, and moved. For more information, see Manually Editing MIDI Notes.