I would like to establish a little bit more of a border between figures and the flow of text in my documents and therefore would like to introduce some graphic elements to a figure enviroment, either in the general definition or each time manually, if necessary. What would be the most advisable way of doing this?
At least, I would like to add a simple black line above and under the figure. Using a simple command like \hline
prints a line, but doesn't look good and throws errors as well.
\begin{figure}%
\begin{center}
\includegraphics[width=\columnwidth]{./2014_Gini_Index2.pdf}
\label{fig:Gini_index}
\caption{Gini-Masterflow}
\vspace{7pt}
\hline
\end{center}
\end{figure}
Ideally, I would like to have something more sophisticated, like the one depicted below with the red rectangle and the line.
Anyways, I am also open to other example and ideas on how to emphasize figures futher!