Abstract: A graphical user interface workstation for use with a manager controller to control and implement changes to telephone sets of customer key telephone systems served by a telephone switching system. The workstation records high resolution graphical representations of each telephone set of a customer key telephone system and enables a customer user to select and display a recorded high resolution graphical representation of each telephone set of the customer user key telephone system. The workstation is interactive with the customer user and enables the customer user to selectively enter telephone lines, features and directory numbers changes into key button locations of a displayed telephone set graphical representation.