Abstract: The screen editor 31 according to the present invention can edit the screens and provide display control over a display unit 2 capable of switching the displayed screens through an operation from an input device such as a touch switch 9. More specifically, a screen shift editing unit 32 creates a screen shift chart through operation by a person, and further prepares screen switching information for shifting a screen according to this screen shift chart, and automatically sets a touch switch for selecting a screen to be switched (a screen to be displayed next) in the screen. Also, the screen shift editing section 32 automatically creates a screen shift chart by utilizing the previously prepared screen information data. Further the screen shift editing section 32 automatically corrects, when an unwanted screen is deleted or when a target screen for shifting is changed, the screen information data of the screen related thereto.