Set your work origin (X0 Y0 Z0)#
Choose where zero sits on the stock. It must match where you zero the machine.
Click Setup.
Under Work Origin, click the spot for X0 Y0. Bottom-left is the usual choice.
Pick Z Origin:
Choose When you zero the bit on Top of stock (usual) The top of the material Bottom of stock The table or spoilboard Click ×.
Check it: when you export, the review repeats your origin. Read it before you cut.
Related: Where zero is, and why it matters · Home and zero the machine