Piano Roll Editor
The Piano Roll Editor shows note events in MIDI regions as editable rectangles on a time grid. The position of each note on the grid shows the time position where it starts playing, its duration (length), and pitch. Note velocity is indicated by color. You can edit notes by moving them, resizing them to change their duration, dragging them vertically to change their pitch, and in a variety of other ways.
![Figure. Piano Roll Editor showing MIDI region with note events.](https://help.apple.com/assets/666A34BC79C468390202D0B9/666A34C7A16BCE32A1063641/en_US/38de2d50d58581882f941a552aaa7ebf.png)
View buttons: Show the normal editing view or Automation view.
Function buttons: Tap to work in different edit modes in the Piano Roll Editor; includes the Trim, Pencil, Brush, and Velocity buttons.
Snap pop-up menu: Set the Snap value and Snap options for the Piano Roll Editor.
Editing area: Edit the notes in the MIDI region or regions on a time grid.
Open the Piano Roll Editor
With a software instrument track or MIDI region selected, tap the Editors button
in the middle of the view control bar.
For information about the Audio Editor, see Intro to the Piano Roll Editor.
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