Click the Speedy Entry tool . Click the measure in
question.
Click the notehead you want to delete.
You can also use the arrow keys to position the insertion bar and crossbar
on the notehead.
Press BACKSPACE
(laptop users Fn-6) or SHIFT+DELETE. Alternative method: Click
the Simple Entry tool , click the Eraser icon , and click directly on the notehead to be erased.
. Click the measure in
question.
, click the Eraser icon 
, and click directly on the notehead to be erased.