At a predetermined location on a touch panel, a document image in a portrait direction, or a document image in a landscape direction is displayed according to a direction of the scanned document, while displaying a corresponding forwarding image in parallel, on the same screen. Since the direction of the scanning document and the direction of the document at the destination are displayed, it is possible to easily confirm how the scanning image is forwarded to the destination, thereby preventing an error of forwarding the document with the wrong direction.