I bought a used Millport Rhino Bed mill that has a Centroid M400 controller. Can someone tell me what I need to do to restart a program from a specific point and still keep my offests etc. Currently if I break a tool I put in a new tool , reset the height offset and tehn air cut until I get to the spot where I broke the tool.

Go to Run F4, then hit F2 Search. It will tell to type in tool change or N000.