I am using an Apple IIc Plus and Apple Access II. The Volume Slide Control on the keyboard for the Apple IIc Plus replaces the 40- or 80-column mode switch found on the original Apple IIc.
Typing PR#3 for 80-column mode and PR#0 for 40-column mode works when in ProDOS, but when using Apple Access how can I switch between 40- and 80-column mode?
Aren't both 40- and 80-column modes supported in Apple Access II?
Apple Access II does not support 40-column mode on the Apple IIc Plus. The software detects that the 80-column mode is available and wants to switch the system into that mode. There is no workaround.