Abstract: A display management system for use with a computer that includes a display system, the display management system including means for generating a representation of a desired screen image; means for periodically updating the display system to display the desired screen image that corresponds to the state of the representation existing at the time of the update; and means for changing the representation so as to record the cumulative effect of a plurality of successive changes that are made to the desired screen image since the last update of the display system.