Provided is a three-dimensional object display control system that enables a three-dimensional object displayed on a screen to be freely rotated by means of instinctive operation. The terminal may receive a terminal capability version of at least one target terminal, and compare the received terminal capability version with a previously stored terminal capability version of the at least one target terminal. The two output members are selectively operatively connectable to an output shaft via a gear arrangement that allows for a plurality of speed ratios between the output members and the output shaft.