parameter		libed_up=1, libed_down=2, libed_right=3, libed_left=4,
     +			libed_set=0, libed_clear = 5
      parameter		disp_files=0, disp_zoom=1

      structure	/display/
         integer*4	id
         integer*4	type /disp_files/
         character*255	library
         character*79	element
         character*39	generation
         integer*4	line /1/, column /1/
         integer*4	height, width
         integer*4	pb_line, pb_col
         integer*4	top /1/, bottom
      end structure