An easy way to delete notes is to hold down the Delete key while clicking on the notes. You can't delete highlighted notes like you describe in the regular notation window, however it is possible to do this in the 'Piano roll' window. In the notation window if you are step-advancing using INS and DEL, this will highlight the current notes in red, and Delete key will delete them.

Your description of N and M is backwards - 'N' inserts a note, and 'M' adds a note a third above. Maybe a typo somewhere..


Andrew
PG Music Inc.