Just found out some HIDDEN FEATURES from close reading of the manual:

COPY AND LOCK

The accomplaniment generator has TWO hidden features which uses mouse 
clicks to get at them.

1. COPY: all the accomplaniment parameters (exept the staus of the 
Mute switch) may be COPIED from one voice to another by CLICKING on 
the Voice Number below the channel label.A dialog will appear in the 
display window asking for a destination track.The UNDO key will 
cancell the copy.

This would be extremly usefull to enter parameters very quickly and 
also LIVE on the fly when the program is running for some interesting 
effects.

2. LOCK: Indevidual voices can be LOCKED OUT from preset changes with 
the Voice Lock feature. If you click on the empty space to the LEFT 
of a voice number, a funky icon will will appear in the space.This 
locks out that row of any preset changes. This is usefull to develope 
a "lead" intrument, and keep the settings that go with that 
instrument while you can change any of the other ones while the lead 
instrument remains uneffected.


Tim