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

  The DEACTIVATE DEVICE statement deactivates the specified output device.
  Subsequent graphics output will not be displayed on this device.  If all
  devices  have  been  deactivated  and  graphics  output  statements  are
  executed, VAX BASIC reactivates the default device.

  Example

  OPTION TYPE = EXPLICIT
  EXTERNAL PICTURE demos, sample
  OPEN "BASIC_term" FOR GRAPHICS AS DEVICE #1
  OPEN "my_vax" FOR GRAPHICS AS DEVICE #2 , TYPE 41
  !+
  !Display on all active devices
  !-
  DRAW demos
  DEACTIVATE DEVICE #2
  !Display on device #1 only
  DRAW sample

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