A door operator includes a door driver for opening and closing a door, and a control system including a microprocessor having multiple microprocessor inputs. The microprocessor is connected to and controls the door driver. The microprocessor has multiple program modules corresponding to input functions to be performed by the door operator. The door operator includes a plurality of door operator inputs connected to corresponding ones of the microprocessor inputs, and a user interface connected to the microprocessor. The user interface allows a user to associate a selected door operator input and corresponding microprocessor input to a selected program module corresponding to a selected function to be performed by the door operator.