%N tvview %F $MIR/src/subs/tv.for
%D Change the viewing window to a subportion of image memory.
%P jm
%: tv, display
%B
        subroutine TVview(xmin,ymin,xmax,ymax)

        implicit none
        integer xmin,ymin,xmax,ymax

  View only a subportion of the screen.

  Input:
    xmin,ymin,xmax,ymax Portion of the screen to view.
