This is a Netscape "Save as .. text" dump of the table and may not be as updated as the source.

                                         Field has value of:
 Desired Setup
               _show _returndocurl _showformat _show[n] _title _show_vals _showtext[n]
 Return some
 static
 document to    true    the URL                          not set
 the user
 Return an
 HTML document
 as specified                          the
 in an          true    not set     external                   not set
 external file                        file
 with variable
 instatiation

 Return an                                     the HTML
 HTML document                                  of the
 specified                                     document
 inline with    true          not set             (in               not set
 variable                                       symbol
 instatiation                                   encoded
                                                format)
 Return some
 fields to the                                                 the fields
 user in the    true                  not set                   you want     not set
 default                                                        displayed
 format                                                         or "all"
 Return some
 fields to the
 user in the
 default                                                       the fields the text you
 format and     true               not set                the   you want   want put at
 with a custom                                           title  displayed    the end
 title and                                                      or "all"
 some text
 afterwords
 Nothing
 returned.
 This may
 cause
 warnings on
 browsers and
 is not                                        not set
 generally
 recommended.
 Return a
 message that
 says thank
 you instead.