Click the Speedy Entry tool and click the measure
in question. The editing frame appears.
Using the arrow keys, position the cursor on
the note you want to change to a grace note, and press the semicolon (;) or the G key.
The note becomes a grace note. On playback, the grace note will play just
ahead of the beat—even if there are many grace notes together, forming
a run. To change a grace note to a normal note, repeat the above procedure.