Is there a feature where Mach3 can remember a manual move, and store the move as a file name for future automation use?

The concept is to test out an SMT pick and place mod for a benchtop CNC mill by attaching a vacuum nozzle to the spindle.  At first the nozzle is moved to a part located in a fixed position, then turn on the vacuum, pick up the part and manually position it on a PCB, release the vacuum, raise spindle up.  That complete 'move' is stored as a filename, ie  R2  or C3, or IC14. 

I would probably mount a servo to the spindle to manage rotation from 0 - 90 degees, and either use an existing free mosfet on the controller driven by a coolant  on/off gcode command, or similar. 

Thanks

You could use the TEACH function.
Described here in the manual.

Or use Brians JOG to G CODE plugin
RC

Great, thanks for that info.