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NAME
     helpviewer - OpenWindows viewer for on-line help handbooks

SYNOPSIS
     helpviewer -f help-handbook-file

DESCRIPTION
     helpviewer is an OpenWindows  application  for  viewing  and
     navigating on-line help handbooks.

     helpviewer lets you page through a help handbook, magnify or
     reduce  pages,  and  follow  hypertext  links  and table-of-
     contents entries within a handbook and to  other  handbooks.
     Because  help  handbooks  are in PostScript format, they may
     contain high quality fonts and graphics.

     You should not start helpviewer  directly.   It  is  started
     automatically  by  OpenWindows  when you click SELECT on the
     "More" button in a spot help window, or when you select  the
     "Help..."  item in the OpenWindows root menu.

OPTIONS
     helpviewer  accepts  most  of  the  generic  tool  arguments
     described in xview(7), as well as the following options:

     -f help-handbook-file
          Specify the name of the help  handbook  to  be  viewed.
          This file name should be specified relative to a direc-
          tory in $HELPPATH (see ENVIRONMENT below).

USAGE
     Once a help handbook is displayed in the helpviewer  window,
     you can view it as follows:

     Page Turning
          Click SELECT on the left and right arrow buttons at the
          top  of  the  helpviewer  window to page back and forth
          through a handbook.  The PgUp and PgDn keys on the key-
          board  perform  the  same  functions.  In addition, the
          Home and End keys let you page through a  handbook  one
          chapter at a time.

     Page History
          helpviewer keeps track  of  each  page  visited.  Click
          SELECT  on  the Go Back button until the window returns
          to the page you want to revisit, or use the  Undo  key-
          board function.

     Hypertext Links
          helpviewer has a simple hypertext mechanism.  Hypertext
          links  are  displayed  as  rectangular  outlines around
          words or graphics on a page.  Double-clicking SELECT on
          a  link  causes  helpviewer to display the handbook and
          page to which the  link  points.   Handbooks  may  have
          links  to  other handbooks.  Certain types of hypertext
          links can  also  initiate  system  processes.   Double-
          clicking  on  these  links  will  start up a program or
          shell script.

     Page Magnification
          Magnify or reduce the size of the handbook  by  pulling
          the  resize corners on the helpviewer window, or select
          the "View->Custom Magnification" menu item.  Select the
          "View->Standard  Magnification"  menu item to reset the
          handbook to the standard size.  For very high  magnifi-
          cations,  select  the "View->Partial Page" menu item so
          that the helpviewer window still fits on the screen.

ENVIRONMENT
     HELPPATH

          This environment variable must be  set  to  the  direc-
          tories    that    contain    help    handbooks    (e.g.
          $OPENWINHOME/lib/locale:$OPENWINHOME/lib/help).     The
          helpviewer  uses the $HELPPATH variable to locate hand-
          book files.  $HELPPATH is typically  set  automatically
          during  the  OpenWindows  startup process, so it is not
          usually necessary to set it yourself.

SEE ALSO
     helpopen(1)

DIAGNOSTICS
     helpviewer(1) displays PostScript error messages in the con-
     sole.

NOTES
     PostScript is a trademark of Adobe Systems Incorporated.

     The OpenWindows environment may no longer be supported in  a
     future  release.  You may want to migrate to CDE, the Common
     Desktop Environment.

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