首先我们需要在文档的开头使用\usepackage{threeparttable}包。
\begin{table*}
\label{table:number}
\centering
\caption{....}
\begin{threeparttable} % highlight !!!
\begin{tabular}{lc}
\hline
A & B \\
\hline
A & B\tnote{*} \\
A\tnote{**} & B \\
\hline
\end{tabular}
\begin{tablenotes}
\footnotesize
\item[*] this is the ....
\item[**] my website is ...
\end{tablenotes}
\end{threeparttable}
\end{table*}
Reference:
https://www.e-learn.cn/topic/2754169
