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Richard Smyth <[log in to unmask]> asks on Fri, 7 Feb 2003 19:37:56 +0100:

>> ... journal that uses square brackets around the footnote numbers in
>> the text, but not in the footnotes themselves.

I don't know of an existing style that does this, but I found a
workable solution.

The fundamental problem is that the footnote design has always assumed
that the same marker is used at the point the footnote is referenced,
and at the point where it is given at the bottom of the page.

Typeset ltfloat.dtx (e.g., from

        ftp://ctan.tug.org/tex-archive/macros/latex/base/ltfloat.dtx

) for documentation on pp. 13ff of how footnotes work.

To get what you want, that critical assumption has to be overcome by
suitable rewriting of macros.

Run latex2e on this little test file to see my solution:

        \documentclass{article}

        \makeatletter
        \def\@makefnmark{\hbox{\Huge{FN: \normalfont\@thefnmark}}}
        \def\@makefnmarkinline{\hbox{[{\normalfont\@thefnmark}}]}

        \def\@footnotemark{%
          \leavevmode
          \ifhmode\edef\@x@sf{\the\spacefactor}\nobreak\fi
          \@makefnmarkinline
          \ifhmode\spacefactor\@x@sf\fi
          \relax}
        \makeatother

        \begin{document}

        This is a footnote\footnote{This is the first one.}
        and this is too.\footnote{This is the second one.}

        \end{document}

What I did here was to redefine \@footnotemark (from latex.ltx) to use
\@makefnmarkinline instead of the normal \@[log in to unmask]  I provided
silly definitions of both \@makefnmark and \@makefnmarkinline to make
them distinctive.

dvi2tty shows the result like this:

                    This is a footnote[1] and this is too.[2]

                 ____________________________

        FN:  1      This is the first one.

        FN:  2      This is the second one.

Of course, the stuff between \makeatletter and \makeatother should be
moved into a new .sty file with suitable documentation in comments,
and then you can replace that ugly block with a simple
\usepackage{funnyfootnotes}.

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