LaTeX figure
From: https://en.wikibooks.org/wiki/LaTeX/Floats,_Figures_and_Captions#Figures
\begin{figure}
\centering
\includegraphics[width=0.5\textwidth]{gull}
\caption{Close-up of a gull}
\label{fig:gull}
\end{figure}
Figure \ref{fig:gull} shows a photograph of a gull.