The steps are as follows.
Press “JOG”
Move spindle by press “X”、“Y”、“Z”
Press “MPG”,then turn handwheel
Choose “SETUP”,then choose “ATM”
Choose “Z SET”
Choose “SETUP”,then choose “TEACHIN”,choose “SETX”、“SETY”
Press “JOG”
Press “Z”

The video is as follows.