Systems, methods, devices, and programming product for displaying on a computer screen (200) a portion of a web page or other interface screen content (400), the methods performed by processors and comprising: accessing a data set representing display content (400) for a computer interface screen (200); mapping the accessed data set into a plurality of tiled content data sets; selecting a portion of the tiled content data set to be rendered into tiled image data set; rendering the selected portion of the tiled content data set into a plurality of tiled image data sets (510); and storing the set of tiled image data sets in a memory (700) controlled by the processor.