In a digital platform apparatus of the present invention, a position of a camera mounted on a screen in a display unit is detected by a position detection unit, and image data is transferred from the camera via a communication unit in accordance with a predetermined instruction operation. The transferred image data is supplied from a control unit to a projector via a display control unit. When the image data is transferred, the transferred image is displayed on the screen from the projector. All image data recorded in the camera is displayed in a demagnified form in the vicinity of the camera, and when image data specified by a predetermined operation is transferred into a recording area, a demagnified image of the transferred image data is displayed in the vicinity of the recording area.