Display apparatus and controlling method thereof

The display device is disclosed. The display device displays a plurality of graphical objects, and a predetermined that the event occurs when the projection from the plurality of graphical objects transparent display unit, except of a predetermined graphical object stops the display of the rest of the graphics object, the transparent display unit displayed subject an image pick-up by a control unit for synthesizing a predetermined graphical object with an image pickup unit for generating the captured image and the generated captured image.