diff --git a/chapters/01_introduction.tex b/chapters/01_introduction.tex
index e1504d9..57d5ada 100644
--- a/chapters/01_introduction.tex
+++ b/chapters/01_introduction.tex
@@ -1,3 +1,6 @@
+% !TeX root = ../main.tex
+% Add the above to each chapter to make compiling the PDF easier in some editors.
+
 \chapter{Introduction}\label{chapter:introduction}
 
 \section{Section}
diff --git a/main.tex b/main.tex
index 3cc39de..3d60320 100644
--- a/main.tex
+++ b/main.tex
@@ -14,6 +14,9 @@
 
 \begin{document}
 
+% Set page numbering to avoid "destination with the same identifier has been already used" warning for cover page.
+% (see https://en.wikibooks.org/wiki/LaTeX/Hyperlinks#Problems_with_Links_and_Pages).
+\pagenumbering{alph}
 \input{pages/cover}
 
 \frontmatter{}