Question

In Notion N-Tempo mode you got a shortkey to bring the cursor to the beginning of the piece, that's double-click on return. What's the equivalent in edit-mode. I can't find it.

Answer 1

If you are playing a song back, you can press the backspace key while the score is still playing back and it will return to the beginning.  If the score has stopped, you can use the Home key to return to the beginning of the score.