GEM genesys ensemble Owner's Manual page 231

Now let’s set the correct key signature for this song. Press
SONG PLAYER/EDIT again, select MASTER TRACK and press
ENTER.
Use the down arrow to select KEY and then use the dial to
choose the correct key for this song. When you’ve finished,
press EDIT START PAR. (F1) again to store your settings.
Now press the SCORE button again.
The correct key signature is now displayed.
genesys ensemble/genesys grand ensemble
J
Press the
EDIT START
PAR. Button
(F1).
Page 64