## 2.9 Index

Currently the index is only supported for LaTeX/PDF output. To print an index after the book, you can use the LaTeX package makeidx in the preamble (see Section 4.1):

\usepackage{makeidx}
\makeindex

Then insert \printindex at the end of your book through the YAML option includes -> after_body. An index entry can be created via the \index{} command in the book body, e.g., \index{GIT}.