Abstract: In a display unit, a setting check key for checking present set contents is displayed together with a setting screen such as a basic screen for performing various basic settings. In a case where a user indicates a setting check key displayed in the setting screen, the display unit displays a template registration key for registering the present set contents as a template together with a setting check screen displaying the present set contents. In a case where the template registration key is indicated, processing is executed to register the present set contents as the template.