答案1
默认文档类通过 格式化脚注标签和引用。在序言中很容易\@makefnmark
重新定义它以使用来设置它:[x]
\documentclass{article}
\makeatletter
% Default:
% \def\@makefnmark{\hbox{\@textsuperscript{\normalfont\@thefnmark}}}
\renewcommand{\@makefnmark}{\makebox{\normalfont[\@thefnmark]}}
\makeatother
\begin{document}
For more information, see~\footnote{More information.} or~\footnote{Some more information.}.
\end{document}