Add appendix example

chapters/backmatter.tex

@@ -1,3 +1,24 @@
+% For the order of things here (appendix, indices, bibliographies, ...) and their
+% numbering, see also https://tex.stackexchange.com/a/20547/120853.
+% Feel free to deviate since this is a subjective topic.
+
+\appendix
+
+\chapter{An appendix chapter}
+
+Some appendix content can go here, for example detailed computations.
+
+\section{More appendix}
+
+The usual sectioning commands keep working, as does page numbering, showcased by the
+following blind text.
+
+\Blindtext
+
+\chapter{Another appendix chapter}
+
+More stuff can go into the next appendix chapter, for example algorithms and code.
+
 \backmatter
 
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