       The  help  facility allows one to look up help pages which
       where extracted from the standard Tcl manual pages and Tcl
       scripts   during   Tcl   installation.    Help  files  are
       structured as a  multilevel  tree  of  subjects  and  help
       pages.   Help  files  are  found  by searching directories
       named help in the  directories  listed  in  the  auto_path
       variable.    All   of  the  files  in  the  list  of  help
       directories form a virtual root of the  help  tree.   This
       method  allows multiple applications to provide help trees
       without having the files reside in the same directory.

       The  help  facility  can  be  accessed  in  two  ways,  as
       interactive  commands  in  the Extended Tcl shell or as an
       interactive Tk-based program (if you have  built  Extended
       Tcl with Tk).

       To run the Tk-based interactive help program:

           tclhelp ?addpaths?

       Where  addpaths  are  additional  paths to search for help
       directories.  By  default,  only  the  auto_path  used  by
       tclhelp  is  search.   This  will  result  in help on Tcl,
       Extended Tcl and Tk.

       The following interactive Tcl  commands  and  options  are
       provided with the help package:

       help
              Help,  without  arguments,  lists  of  all the help
              subjects and pages under the current help  subject.

       help subject
              Displays all of help pages and lower level subjects
              (if any exist) under the subject subject.

       help subject/helppage
              Display the specified help page.  The  help  output
              is  passed through a simple pager if output exceeds
              23 lines,  pausing  waiting  for  a  return  to  be
              entered.   If  any  other character is entered, the
              output is terminated.

       helpcd ?subject?
              Change the current subject, which is much like  the
              Unix   current   directory.    If  subject  is  not
              specified, return to  the  top-level  of  the  help
              tree.   Help  subject  path  names may also include
              ``..'' elements.

       helppwd
              Displays the current help subject.

       help help | ?
              Displays help on the help facility at any directory
              level.

       apropos pattern
              This  command  locates  subjects by searching their
              one-line descriptions for a  pattern.   Apropos  is
              useful  when  you  can remember part of the name or
              description  of  a  command,  and  want  to  search
              through  the one-line summaries for matching lines.
              Full regular expressions may be specified (see  the
              regexp command).
