Display control apparatus, method of controlling a display control apparatus, display apparatus and display control program

A method of controlling a display control apparatus in a display system includes causing a display unit to generate a first certain image indicating a first presentation image to be overlapped on a certain object in display on a display medium on the basis of the recognized certain object; determining a wiping area wiped by a wiper on the display medium on the basis of detected position after the first presentation image is displayed on the display medium; and causing the display unit to generate a second certain image indicating a second presentation image resulting from deletion of a portion corresponding to the wiping area in the first presentation image in the display on the display medium.