The access to the expression editor in drafting is set in the ug_metric.def or ug_english.def file. The initial default is in the UGII dir, the syslog will tell you which file you are running. (I move mine to a network drive, so all seats use a common file.)
Dimensions can be editted to manual values by selecting them in the annotation editor and then entering your value. Like ewh said, you can info the part to see which dimensions have been edited. It is a one way edit, once made manual the only way to get an automatic dimension back is to delete and re-create. Making manual edits and getting caught, gets an e-mail sent to the person responsible and the engineering manager.
"Wildfires are dangerous, hard to control, and economically catastrophic."
Ben Loosli
CAD/CAM System Analyst
Ingersoll-Rand