Insert

This command inserts an item at the cursor position. To insert, use Edit/Insert or press the Insert key. The command's action depends on which window has focus, as shown below.

FocusAction
Chart viewDisplays the Insert Chord dialog and then inserts the specified chord into the song at the current position.
Parts listInserts a new part into the parts list before the current selection, or at the end of the list if there's no current selection.