Does Mach4 have a "skip optional block" function?
For example, on a Haas machine, if a block of gcode has a "/" before each line, all of those lines are optional and can be skipped by the operator.
The closest functionality I have found is to insert a M00 or M01 before the block I want to be optional, with a comment that tells the operator to manually skip to the next op if desired. But that's a little cumbersome.