Saving Preferences for Georegistration Coordinate Units
You can select to store the bounds and coordinate systems of the map or layout view in your PDF file. This type of file is called a Georegistered PDF. You can save preferences to set the georegistration coordinate units to either Use Map Units or Use Degrees. For more information and instructions on how to do this, see Saving Preferences for Georegistration Coordinate Units in the Help System.