1. An image forming apparatus that comprises a display section, and a position detecting section detecting a position of contact with a display screen of the display section, and that forms an image on a recording medium based on a display image displayed on the display section, wherein the display image comprises: an object image indicative of an object for an image formation; and a medium image indicative of the recording medium, wherein the image forming apparatus comprises an editing section that selectively performs edition of either the object image or the medium image based on positions of two points detected by the position detecting section.