Alan S Murphy: Automatic highlighting in a raster graphics display system. International Business Machines Corporation, George E Clark, Joseph J Connerton, Frederick D Poag, February 16, 1988: US04725829 (33 worldwide citation)

In an interactive graphics display system in which pels in a frame buffer are mapped to the display screen of a raster display device, a method of automatically highlighting and de-highlighting graphic segments as a cursor is moved across the display screen comprises sampling a locator device at suc ...