Library /sys$common/syshlp/basichelp.hlb Graphics, SET Statements, DEVICE_WINDOW  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  The SET DEVICE WINDOW statement lets you change the boundaries of  the
  device window.  The device window is a portion of NDC space you select
  to  be  displayed  on  the  device  viewport  of  an  active   device.
  Boundaries must be within the range 0 through 1.

  Example

  OPEN "VTA25" FOR GRAPHICS AS DEVICE #1
  SET DEVICE WINDOW #1 : 0.5,1,0.5,1

  Additional Information (explode) :

• Syntax