1. A photographing unit configured to perform a photographing operation of capturing image data of an object when an instruction for capturing the image data of the object is input, the photographing unit comprising: a display unit configured to display on a display at least one of a plurality of icons including a first icon indicating a first camera function and a second icon indicating a second camera function; and a display controller configured to display the first icon at a predetermined position of the display when a camera function of the photographing unit is set to the first camera function, wherein the display controller is further configured to cause the second icon to appear on the display in a large size and to cause the second icon to appear on the display in a reduced size subsequent to the second icon appearing on the display in the large size, when the camera function is set to the second camera function from the first camera function.