How to add a footnote in a text inside tikzpicture in latex?

Question

How can I add a footnote to a text that is inside a tikzpicture in latex?

Thank you.

Answer 1

You can do footnotes in TikZ pictures the same way you do footnotes in tables or figures, i.e. either you use \footnotemark inside and \footnotetext outside or you wrap the text in a minipage to have the footnote placed directly underneath in the middle of the page.

\documentclass{article}
\usepackage{tikz}
\setlength{\textheight}{3cm} % only for demo!
\begin{document}
\begin{tikzpicture}[every node/.style={
    draw=red, rectangle, rounded corners
  }]
  \node (a) {Hello world!\footnotemark};
\node [below of=a] (b) {%
    \begin{minipage}{5cm}
      foobar\footnote{This footnote is inside the picture}
    \end{minipage}%
  };
\end{tikzpicture}
\footnotetext{This footnote is outside the picture}
\end{document}