The idea is to have post header and footer fields in the MOP edit window somewhere, in order to give an easy way to add g or m code before and after each MOP. This is available in some CAM software such as CAMBAM. Having it in the Operation edit window would eliminate the need for customized posts or manually edited g code for this particular need.
Background: My workflow is from Fusion to Mach3, and I'm running a laser table using a Mill post. Normally a spindle wouldn't need to be turned off between operations, but a laser does. I can go in and edit the gcode manually, inserting the corresponding M codes before and after the operation, but this would save that step.