Hello all first post on the forums, I did some searching and didn't find what I was looking for. Today I was using a Haas mill probably a 2005ish mini mill and when I touch off a tool the started to run the tool path it was going to rapid Z into the part. After some investigation I found when I hit the "Tool length Measure" button it was adding the value that was in the G54 onto the number recorded in the height offset page. After using different Haas machines for15 years this is the first time I've ever seen this feature, so needless to say I have no idea what it is called. I'm assuming its one of he parameters that can be switched on and off, but after searching through some posts I found other people running into the same thing but I was not able to fine the parameter number that controls this feature. Would anyone know the parameter number that controls this feature?