A control method including home screen display step of making display section display a home screen where identification images representing the respective input interfaces are displayed in respective display areas so as to correspond one-to-one when image information is not input to N input interfaces provided to the display device, determination step of determining whether one of the input interfaces has changed to state in which the image information is input, identification step of identifying display area having the highest priority representing an order of displaying image out of the display areas where the identification images are currently displayed when the determination result is affirmative, and home screen information update step of displaying image input to input interface in display area thus identified, and displaying the identification images of the input interfaces in the state in which the image information is not input in the display areas lower in priority.