DM-41

[DMaier]

I don't think it's possible to change fonts (based on the two possible definitions of '7' that have occurred to me). Also, I'm wondering what the T+X and COR shifted functions do. If you hold COR, it shows CORRECT in the display - no doubt some form of positive reinforcement.

EDIT: T+X and CORRECT are covered on page 238 of the HP-41CX Owner's Manual Volume 2. CORRECT adjusts the "accuracy factor" of the internal clock. T+X is used to alter the clock for time zone and daylight savings time adjustments.