This paper proposes a system to enlarge display image appropriate for the estimated visual characteristics of visually disabled and aged people. Setup information for enlargement, which is enlargement position and maguification of the display image, are estimated by using user's concentration level, the distance between users' head and the display, and user's remote controlled input to the system or direct input to the display. The image on the display are enlarged according to these information. Visually disabled and aged people show the enlarged display image appropriate for individual visual characteristics by using enlargement information.