\begin{overpic}[width=0.49\textwidth]{20YJ-139} \put(1,74){\colorbox{white}{(\sublabel{20YJ-139}) \href{http://dream.misasa.okayama-u.ac.jp/?q=20200409102918-543197}{20YJ-139}}} %%(\subref{20YJ-139}) \href{20YJ-139} \color{red} \end{overpic}