-  Click the Speedy Entry tool  , and click the measure 
 in question. The editing frame appears. , and click the measure 
 in question. The editing frame appears.
-  Press the directional arrow keys until the 
 insertion bar and crossbar are positioned squarely on the notehead you 
 want to change. You can also click the notehead with the mouse. 
 If the note you want to change is the only entry, the crossbar does not 
 have to be directly on the notehead.
- Press the 9 key. Pressing the 9 key 
 flips a note to its enharmonic equivalent. If you press 9 again while 
 the crossbar is positioned on the changed notehead, the note will flip 
 back to its original identity. 
- Special feature: If you press OPTION+9, 
 you’ll also change all other notes on the same line or space in the measure. 
 The crossbar does not have to be on a notehead to use this option.