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# 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 ...

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