In the event that a cellular telephone is placed in a charging stand in an incoming wait status or if a predetermined time that the device has been left unattended elapses, a slide show display is executed which sequentially switches and displays a plurality of images in the main display portion but only when in the arrangement position of namely, view style, in a folded position with the main display portion facing outward. Additionally, when executing a slide show display, the slide direction is switched as the image size adjusts corresponding to the direction (portrait display position, landscape display position) of the main display portion.