MIDI : MIDI Editors : MIDI Editor Window Toolbar : MIDI Editing Controls

MIDI Editing Controls
The MIDI Editing controls function exactly the same way in MIDI Editor windows as in the Edit window.
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Play MIDI Notes When Editing, Link Timeline and Edit Selection, and Mirrored MIDI Editing are all global settings that are available in the Edit window, MIDI Editor windows, and in the Score Editor window.
Track Edit Selector
If more than one MIDI or Instrument track is shown in the MIDI Editor window, the Track Edit selector lets you select which track is “pencil-enabled.” You can manually insert MIDI notes only in pencil-enabled tracks. You can also pencil-enable tracks in the Track List (see Manually Inserting MIDI Notes).
Default Note Duration
The Default Note Duration selector lets you define the default note duration for manually inserted notes.
Default Note On Velocity
The Default Note On Velocity setting lets you define the default Note On velocity for manually inserted notes.
Play MIDI Notes When Editing
When enabled, Play MIDI Notes When Editing causes MIDI notes to sound when you insert them with the Pencil tool, click them with the Grabber tool, Tab to them, or select them with the Note Selector tool.
Link Timeline and Edit Selection
When this button is enabled, the Timeline and Edit selections are linked. When it is disabled, you can make Timeline and Edit selections independently of one another.
Mirrored MIDI Editing
Mirrored MIDI Editing lets you edit MIDI clips and have your edits apply to every copy of the same MIDI clip. This can be particularly useful when editing looped MIDI clips.
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If Mirrored MIDI Editing mode is disabled, and you edit notes of looped clips in Notes view, the edit flattens the loop. Similarly, editing clip groups separates the clip groups.