(form "20503" (size 40 9)
 (heading "DRAW BLOCK MODEL"
)
 (label (position 5 3) (text "Replace current drawing?"))
 (field "display" (position 32  6) (display_length  4) (input allowed)
    (value_in "normal" "point_cloud" "regular")
    (translate lower) (null allowed) (max_length 256))
 (field "block_size" (position 29  8) (display_length  10) (input allowed)
      (max_length 50)
 )
 (label (position 5 4) (text "Clear constraints?"))
 (field "constraint" (position  29  4) (display_length  1) (input allowed)
        (max_length 1) 
        (translate upper) (value_in "Y" "N") (null disallowed)
        )
 (label (position 5 5) (text "Remove slicing?"))
 (field "slice" (position  29  5) (display_length  1) (input allowed)
        (max_length 1)
        (translate upper) (value_in "Y" "N") (null disallowed) 
        )
 (label (position 5 6) (text "Rescale?"))
 (field "rescale" (position  29  6) (display_length  1) (input allowed)
        (max_length 1)
        (translate upper) (value_in "Y" "N") (null disallowed)
        )
 (field "all_blocks" (position  29  6) (display_length  1) (input allowed)
        (max_length 1) (translate upper) (value_in "Y" "N") (null disallowed))
 (field "cloud_marker" (position  29  6) (display_length  5) (input allowed) (max_length 50))
 (field "cloud_size" (position  29  6) (display_length  5) (input allowed)(max_length 2))
    

 (default_buttons)
)