50g question: How to lock in PROOT sub-menu?

[Joe Horn]

Short answer: Set flag -117 (and leave it always set) and try again.

More complete answer: There are three different ways of accessing PROOT via menu:

(1) With flag -117 clear (default), press RS+7 (the "+" means hold down the shift key while pressing the 7), POLY, ENTER. This is what you described above.

(2) Press RS-7 (the "-" means let go of the shift key before pressing the 7), 3 ENTER. This launches the interactive "app" which apparently you want to avoid.

(3) With flag -117 SET (not the default but you want this!), press RS+7, POLY. See PROOT in the soft menu area.