Abstract: To present the operating state of a tracing operation in the event of performing a tracing operation to scroll objects of display. Upon a tracing operation being performed as to the operating face of an input detection device (1) provided on the display face of a display device (5), coordinate information indicating he instructed position corresponding to the tracing operations is output from the input detection device (1) . A user interface control unit (2) detects the operation direction and amount-of-operation with the starting position of the tracing operation as a reference, based on the coordinate information from the input detection device (1), and effects control so as to change the display mode of operating symbols displayed on the display screen of the display device (5).