This may be well known to many MPG2 users, but I didn't find anything prior to Smiler's guide. I followed his lead and found that as long as Mach 3 was in MPG Jog Mode (Tab to get jog screen; use Jog Mode (Ctrl J) to highlight MPG indicator), I could switch axes and resolution on the MPG2 pendant and then by pushing the "Enable" button on the MPG2, the signals would be communicated to Mach 3 and the appropriate indicator lights would illuminate on the screen.
Smiler, thanks again.
Doug