%%
%% The LaTeX Companion, 3ed
%%
%% Example 7-4-11 on page I-553 in "subcaption --- Substructuring floats".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%%
%% See
https://www.latex-project.org/lppl.txt for details.
%%
\documentclass{tlc3exa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{207.0pt}
%StartShownPreambleCommands
\usepackage{graphicx,subcaption}
%StopShownPreambleCommands
\begin{document}
\begin{figure}
\centering
\begin{minipage}{3cm} \centering
\includegraphics{cat}
\subcaption{Small}
\end{minipage}
\begin{minipage}{3cm}
\includegraphics[width=3cm]{elephant}
\subcaption{Large}
\end{minipage}
\caption{Exercising manual control}
\end{figure}
\end{document}