set-margin

• (send a-ps-setup set-margin h v) -> void
      h : non-negative real number
      v : non-negative real number

  Sets the horizontal and vertical PostScript margins. When drawing to a post-script-dc%, the page size reported by get-size subtracts these margins from the normal page area (before taking into account scaling affects). In addition, drawing into the post-script-dc% produces PostScript output that is offset by the margins.

  When using the output of a post-script-dc% as Encapsulated PostScript, the margin values are effectively irrelevant. Changing the margins moves the PostScript image in absolute coordinates, but it also moves the bounding box.

  The margins are in unscaled post-script-dc% units, which are points. The default margins are 16 points.