Delete notes in the Score Editor
You can delete notes and other items displayed in the Score Editor. Events such as MIDI controller events or pitch bend data are not deleted, even if you delete the notes the events were recorded with.
Delete a note or other item in the Score Editor
Do one of the following:
Select the item, then choose Edit > Delete (or press the Delete key).
Click the item with the Eraser tool.
Repeat signs and special bar lines cannot be selected, and can only be deleted with the Eraser tool.