Time for action – using footnotes in text and in headings

Let's go back to the very first example of this chapter. We shall insert one footnote in the body text and one in a section heading:

1. Modify the example inserting a footnote, as shown in the highlighted line:

   \documentclass[a4paper,12pt]{book}
   \usepackage[english]{babel}
   \usepackage{blindtext}
   \begin{document}
   \chapter{Exploring the page layout}
   In this chapter we will study the layout of pages.
   \section{Some filler text}
   \blindtext
   \section{A lot more filler text}
   More dummy text\footnote{serving as a placeholder} will follow.
   \subsection{Plenty of filler text}
   \blindtext[10]
   \end{document}

2. Typeset to see how the footnote looks in print:

   

3. Insert a footnote in the second section header. This time, put \protect right before:

   \section{A lot more filler text\protect\footnote{to fill the page}}

4. Typeset to check that it works:

   

What just happened?

The command \footnote{text} placed a superscripted number at the current position. Further, it prints...