You can reset all note attributes to their default settings if you decide you don’t want to keep your changes. When resetting note attributes, be aware that all symbols directly attached to notes (accents, fermatas, jazz symbols, and so on) are deleted.
Do one of the following:
Choose the Score Editor’s Functions > Note Attributes > Reset All Attributes option (or use the Reset Note Attributes key command).
Control-click a note head, then choose Attributes > Reset All Attributes from the shortcut menu.