If X and A are slaved can I have different steps/per for A than X? or they have to be the same number? or is the steps number ignored in the A setting under motor tuning?

Is there a way to adjust the Z hight with a MPG or keys while the machine is running code?  This is a grinding application so as the tool wears I want to manually lower it as needed.

Thanks

All settings must be the same to be slaved.

There was a thread yesterday about raising and lowering the Z while running. It involves using the Torch Height Control and creating 2 buttons.