US Patent 7251045 Printer driver

A printer driver that permits a user to efficiently confirm the contents of a printing setup for a printer. For each of the printing setup entries, a printing setup comparison unit compares the initial printing setup contents with the current printing setup contents. When the printing setup comparison unit ascertains that a difference exists between the initial printing setup contents and the current printing setup contents, the printing setup comparison unit outputs, to a printing setup display unit, a differential printing setup that includes differential printing setup contents, which indicate the current printing setup contents for which the difference exists, and a differential printing setup entry, which is the printing setup entry that corresponds to the differential printing setup contents. The printing setup display unit displays the differential printing setup.