According to the present invention, there is provided a display device including: an operation detecting unit configured to detect a touching operation conducted on a display screen; a determination unit configured to determine whether or not the touching operation detected by the operation detecting unit includes an operation involving movement of a touch position within a predetermined region of the display screen; a display unit configured to display an image on the display screen; and a control unit configured to control to enlarge or reduce the image size on the display screen around a position of image depending on at least one of a start position and an end position on the display screen of the touching operation in the case of the determination unit has determined that the touching operation includes the operation involving movement of the touch position within the predetermined region.