In a printer driver 1, user interface UI-1 is displayed in the beginning and setup items are displayed in the respective display forms of the basic level on this user interface UI-1. In this state, basic explanations or detailed explanations are omitted. In addition, user interface UI-2 is displayed when the "Other Features" button is pressed in user interface UI-1 and setup items are displayed in the respective display forms of the applied level on this user interface UI-2. In this state, basic explanations or detailed explanations etc. concerning print control information entered via the setup items are displayed, which makes it possible to learn what type of information the print control information is.