21. The method of claim 19 , wherein the step of obtaining the information data includes changing the information data in order to effect a change in the information.
19. The method of claim 18 , wherein the processing step further includes using the presentation data to present the electronic image on a presentation device, and to retrieve the information data, whereupon retrieving the information data the processing step uses the information data to present the information contain in the region on the presentation device.