/sys$common/syshlp/helplib.hlb VIEW, Example  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  $ VIEW MY_INPUT.DTIF/FORMAT=DTIF/OPTIONS=MY_
 OPT.CDA$OPTIONS /NOOUTPUT -
  _$ /NOPAGE /INTERFACE=DECWINDOWS /OVERRIDE_
 FORMAT /WIDTH=80 /HEIGHT=66

      This command invokes the CDA Viewer to view a file named MY_
      INPUT.DTIF, which has the DTIF format. The display interface
      is DECwindows Motif, and the CDA Viewer will override the
      document's default format. The display width will be 80
      characters, and the display height will be 66 lines.