A keresztet ki kell tenni, majd láthatatlanra állítani.

A kézikönyv szerint például így:

To hide (or show) an accidental
• Click the Speedy Entry Tool.... Click the measure containing the accidental. The editing
frame appears.
• Position the insertion bar and crossbar on the note in question. Use the arrow keys or the
mouse.
• Press the asterisk (*) key. The accidental disappears (or, if there was no accidental, one now appears). The note’s pitch, however, doesn’t change; Allegro still plays it back as though the accidental were visible. If you press the asterisk again, the accidental reappears.

--péter