To edit multiple receptacles, go to
Ribbon: DM Electrical->Devices-> 
Edit Multiple Receptacles
Pulldown Menu: DM Electrical->Receptacles->Edit Multiple Receptacles
You will be prompted to select the receptacles to be edited.
Select receptacles to edit:
The Edit Multiple Receptacles dialog box will appear.
Edit Multiple Receptacles Dialog Box
Changes can be made to the receptacles in the same way as when they were inserted. See the Insert Receptacles section for more information.