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

      SET DEVICE WINDOW [#dev-id : ] exp-list

  Exp-list must be four  numeric  expressions  for  the  left,  right,
  bottom and top boundaries.