1. An apparatus for adding on metainformation, comprising: a first display control device for controlling a display device in such a manner that a color image represented by color image data is displayed on a display screen; a second display control device responsive to a metainformation registration command for controlling the display device in such a manner that a color bar in which multiple colors are arrayed is displayed on the color image displayed under control of said first display control device; a color designating device for designating one color from the color bar displayed under control of said second display control device; a third display control device for controlling the display device in such a manner that an image portion within the color image being displayed on the display screen and that corresponds to the color designated by said color designating device is displayed distinct from other portions of the color image, and in such a manner that only object names corresponding to objects having the designated color are displayed; an object name selecting device for selecting a desired object name from among the object names displayed under control of said third display control device; and a recording control device for recording data representing the object name selected by said object name selecting device and data representing the color corresponding to the color designated by said color designating device on a recording medium in association with color image data representing the color image displayed under control of said first control device.