\documentclass[12pt]{article}
\usepackage{amstext, amsmath}
\usepackage{chemarrow}
\begin{document}
\let\rightarrow\chemarrow
Begin $\xrightarrow[\text{Text below the arrow}\footnote{this is footnote}]{\text{Text above the arrow}}$ end
\end{document}
它显示脚注编号,但实际上并未在底部显示脚注
答案1
使用\footnotemark
和\footnotetext
\documentclass[12pt]{article}
\usepackage{amstext, amsmath}
\usepackage{chemarrow}
\begin{document}
\let\rightarrow\chemarrow
Begin $\xrightarrow
[\text{Text below the arrow\footnotemark[1]}]
{\text{Text above the arrow}}$ end
\footnotetext[1]{this is footnote}\stepcounter{footnote}
foo\footnote{bar}
\end{document}