Change note heads
When Additional Score Options is selected in the Advanced preferences pane, you can choose note heads to use for a variety of specific situations, such as percussion parts, harmonics, tremolo, and for other special conditions.
Change note head attributes
Do one of the following:
Drag a note head from the Part box to the note you want to change.
Double-click a note, then choose a note head from the Note Head pop-up menu in the Note Attributes window.
For more information about dragging note heads from the Part box, see Change the appearance of note heads.