Labels “a)”, “b)”, "c)", "d)" below and to the left of each subfigure

Question

I want to produce one figure that contains four subfigures and label “a)”, “b)”, "c)", "d)", below and to the left of each subfigure, just like the picture shows.

I searched the Internet, but I only found the method of labeling "a" or "(a)" and did not find the result of "a)" and left justifying.

So, there are two requirements: "a)" and left justifying of four subfigures.

Answer 1

• you not provide any information about your document, so the used document class and packages for sub figures are unknown to us

• one solution in the case that your document class is article and that you use the subcaption package:

\documentclass{article}
    \usepackage{graphicx}

    \usepackage{caption}
    \usepackage[skip=0.5ex, belowskip=1ex,
                labelformat=brace,
                singlelinecheck=off]{subcaption}

    \begin{document}
\begin{figure}[!ht]\centering
    \begin{subfigure}{0.40\textwidth}
        \includegraphics[width=\hsize]{example-image-a}
        \caption{Subfigure a}
        \label{fig.SICAPI}
    \end{subfigure}
\hfil
    \begin{subfigure}{0.40\textwidth}
    \includegraphics[width=\hsize]{example-image-b}
    \caption{Subfigure b}
    \label{fig.painel_sicapi}
\end{subfigure}

    \begin{subfigure}{0.40\textwidth}
        \includegraphics[width=\hsize]{example-image-c}
        \caption{Subfigure c}
        \label{fig.SICAPI}
    \end{subfigure}
\hfil
    \begin{subfigure}{0.40\textwidth}
    \includegraphics[width=\hsize]{example-image}
    \caption{Subfigure d}
    \label{fig.painel_sicapi}
\end{subfigure}
    \caption{Image}
    \label{fig.sicapi}
\end{figure}
    \end{document}