Do you have home switches? if so, the homed out position is G53, you can set up G54, G55 G56 etc off of the home position. when you home it out you want to set the settings to zero the axis' when homed. then you go edge find, switch to the first offset or what you want and touch it.(in the offsets tab) The z-axis shoudl be set in the tool table.
When your cutting going from one offset to the other(lift to a safe z to clear stuff)
G0 X Y
pretty simple overall