Logic Pro for Mac Piano Roll Editor interface
The Piano Roll Editor shows notes in MIDI regions as 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 individual notes by moving them, resizing them, dragging them vertically to change their pitch, and in a variety of other ways.
Piano Roll Editor menu bar: Contains menus with region editing commands and functions, as well as buttons for viewing automation, activating MIDI input and output, selecting editing tools, and zooming the editor.
Piano Roll Editor inspector: Contains controls for quantizing note timing and adjusting note pitch and velocity.
Display area: Shows the notes in the MIDI region or regions as bars on a time grid.
Ruler: Shows time divisions so you can align and edit notes at precise time positions.
Playhead: Reflects the current playback position.
For more information about using the Piano Roll Editor, see Overview of the Piano Roll Editor.