I don't know how to word this, but if I want output like so
The Universe* is full of all universes+ even though the Universe* is the same size as any one of the universes+
*The Universe formed of all the stars and planets
+The alternate universes
I can try modifying \footnote{} commands to make this happen, as explained in this answer (Reference different places to the same footnote:spet). However, another answer in there cautions against it (Reference different places to the same footnote:spet).
How do authors usually tackle this situation? Specifically, these symbols need to be embedded in a table (which I have inside minipages), then the legend would need to be immediately below the table/minipage.
Minimal Working Example
\documentclass{article}
\begin{document}
\begin{minipage}[c]{0.9\textwidth}%
\footnotesize
\begin{center}
\begin{tabular}{| l | l |}
\hline
Category & Value\\hline
Bla & $60^{+}$\\hline
Bla & $60^{}$\\hline
Bla & $30^{+}$\\hline
Bla & $90^{}$\
\hline
\end{tabular}
\end{center}
\end{minipage}
\begin{itemize}
\item[+] Rounded up
\item[*] Rounded Down
\end{itemize}
\end{document}



minipageinside atable. Or you don't mean atable. But actually code would be a lot easier to work with! – cfr Sep 14 '15 at 01:13