ArcMap – Switching Map Units on Data Frame Properties to Feet

arcgis-10.1arcgis-desktopdata-frame

Using ArcView 10.1, I cannot switch the Map (Units) nder Data Frame Properties to Feet. It is currently at Decimal Degrees. Display can switch.

How do you switch it back to Feet?

Best Answer

I believe you must have your coordinate system set to a system that uses feet as its units.