I had to reload Mach3 and now my arrow keys are moving the head in opposite direction then the original setup.  Also seems like my 0,0 is in the opposite corner.  How do I reset the table 0,0 (not new 0,0) anywhere on the table) so the CNC uses then correct spot and correct the arrow keys. I would imagine that once the new 0,0 is established that would correct the arrow keys. I have a 3axis CNC with gantry, table does not move. Thanks, John

Config -> Port's Pins's -> Motor Ouputs - Dir LowActive  maybe the trick?