When glossiness in an area designated by a user was adjusted, the glossiness adjustment was achieved by exchanging a plurality of toners having different glass transition points. Thus, the user was required to select an appropriate toner when the glossiness in the area designated by the user was adjusted. Further, the user took some time or effort to set the selected toner every glossiness adjustment. In the present invention, how to adjust the glossiness in the area designated by the user is obtained as mode information and on the basis of the obtained mode, control is effected so that a transparent image is selectively formed in the area designated by the user or an image formable area except for the area designated by the user.