I want to add A, B, C... on the top and one, two, three on the left follow is my code:
\begin{figure*}[ht]
\centering
\subfloat[]{\includegraphics[width=0.22\columnwidth]{fig5a1.png}
\label{fig5a1}}
\subfloat[]{\includegraphics[width=0.22\columnwidth]{fig5b1.png}
\label{fig5b1}}
\subfloat[]{\includegraphics[width=0.22\columnwidth]{fig5c1.png}
\label{fig5c1}}
\subfloat[]{\includegraphics[width=0.22\columnwidth]{fig5d1.png}
\label{fig5d1}} \\
\subfloat[]{\includegraphics[width=0.22\columnwidth]{fig5a2.png}
\label{fig5a2}}
\subfloat[]{\includegraphics[width=0.22\columnwidth]{fig5b2.png}
\label{fig5b2}}
\subfloat[]{\includegraphics[width=0.22\columnwidth]{fig5c2.png}
\label{fig5c2}}
\subfloat[]{\includegraphics[width=0.22\columnwidth]{fig5d2.png}
\label{fig5d2}}
\caption{picture}
\label{fig5}
\end{figure*}


\subfloats, See my answer (will appear soon). – Zarko Aug 28 '21 at 09:48