Abstract: A graphics display subsystem providing internally timed time-varying properties of display attributes is provided. The graphics display subsystem comprises a display device for displaying consecutive image frames of pixels having a variable display property, and a circuit for transferring image frames to the display device. One or more pixels are selected when a display attribute associated with the one or more pixels is set in an attribute table. The circuit varies, during a selected time interval, the display property of the selected pixels being displayed on the display device. In preferred embodiments, the variable display property is either a stereo image display, an image brightness control, or an image-blending control.