I want to rename some of the job properties used in RPD

I was so happy when you expanded the number of custom job properties that I could use from 5 to 10 but they still have names like Custom1 and Custom8.  It takes a lot of training to tell my operators what those properties mean as headings on the Jobs table that they need to sort by to find the FLats v Folds or MICR or Regular jobs.  Why can't I rename those properties to something my operators will understand?