diff --git a/latex/book/book.tex b/latex/book/book.tex
index f7f9235..0879755 100644
--- a/latex/book/book.tex
+++ b/latex/book/book.tex
@@ -5,11 +5,12 @@
 \usepackage[subpreambles=true]{standalone}
 \usepackage{import}
 
-\usepackage[T1]{fontenc} % encoding
-\renewcommand{\familydefault}{\sfdefault} % sans-serif font
-\usepackage[nopatch=footnote]{microtype} % better font looking
+% Font
+\usepackage[T1]{fontenc}
+\renewcommand{\familydefault}{\sfdefault}
+\usepackage[nopatch=footnote]{microtype}
 
-% Langages
+% Languages
 \usepackage[french]{babel}
 \frenchsetup{SmallCapsFigTabCaptions=false}
 \usepackage{csquotes}
@@ -46,18 +47,18 @@
 
 % Dependencies
 \usepackage[
-  pdfauthor={\docAuthor},
-  pdftitle={\docTitle},
+  pdfauthor={\docAuthor},   % author  metadata
+  pdftitle={\docTitle},     % title   metadata
   pdfsubject={\docSubject}, % subject metadata
-  hidelinks,
+  hidelinks,                % clickable links in table of contents
 ]{hyperref}
 
-
 \title{\docTitle}
 \author{\docAuthor}
 \extra{\docSubject~$\cdot$ \docLocation}
 \date{}
 
+
 \begin{document}
 \maketitle
 \flushbottom
diff --git a/latex/book/sections/section1.tex b/latex/book/sections/section1.tex
index b478586..1031af5 100644
--- a/latex/book/sections/section1.tex
+++ b/latex/book/sections/section1.tex
@@ -4,6 +4,7 @@
 % \usepackage{minted}
 % \usemintedstyle{emacs}
 
+
 \begin{document}
 
 Here is the first section.
diff --git a/latex/book/sections/section2.tex b/latex/book/sections/section2.tex
index 3d0e73b..f908688 100644
--- a/latex/book/sections/section2.tex
+++ b/latex/book/sections/section2.tex
@@ -4,6 +4,7 @@
 % \usepackage{minted}
 % \usemintedstyle{emacs}
 
+
 \begin{document}
 
 Here is the second section.
diff --git a/latex/book/sections/section3.tex b/latex/book/sections/section3.tex
index 8fd1b24..21eecf0 100644
--- a/latex/book/sections/section3.tex
+++ b/latex/book/sections/section3.tex
@@ -4,6 +4,7 @@
 % \usepackage{minted}
 % \usemintedstyle{emacs}
 
+
 \begin{document}
 
 Here is the third section.
diff --git a/latex/document/document.tex b/latex/document/document.tex
index bf4d571..3acfb8b 100644
--- a/latex/document/document.tex
+++ b/latex/document/document.tex
@@ -1,11 +1,12 @@
 \DocumentMetadata{testphase = {phase-III,math,firstaid}}
 \documentclass[a4paper]{article}
 
-\usepackage[T1]{fontenc} % encoding
-\renewcommand{\familydefault}{\sfdefault} % sans-serif font
-\usepackage[nopatch=footnote]{microtype} % better font looking
+% Font
+\usepackage[T1]{fontenc}
+\renewcommand{\familydefault}{\sfdefault}
+\usepackage[nopatch=footnote]{microtype}
 
-% Langages
+% Languages
 \usepackage[french]{babel}
 \frenchsetup{SmallCapsFigTabCaptions=false}
 \usepackage{csquotes}
@@ -52,6 +53,7 @@
 \extra{\docSubject~$\cdot$ \docLocation}
 \date{}
 
+
 \begin{document}
 \maketitle
 \flushbottom
diff --git a/latex/presentation/slides.tex b/latex/presentation/slides.tex
index 973866b..d5b0aa6 100644
--- a/latex/presentation/slides.tex
+++ b/latex/presentation/slides.tex
@@ -6,14 +6,15 @@
 \author{YOU}
 \date{}
 
-\begin{document}
 
+\begin{document}
 \maketitle
 
 \begin{frame}[t,plain]{\contentsname}
   \tableofcontents
 \end{frame}
 
+
 \section{SECTION}
 \begin{frame}{TITLE}
   Hello, world!
@@ -25,5 +26,4 @@
   \end{center}
 \end{frame}
 
-
 \end{document}
diff --git a/latex/presentation/slides_advanced.tex b/latex/presentation/slides_advanced.tex
index aea1cb2..7e49b10 100644
--- a/latex/presentation/slides_advanced.tex
+++ b/latex/presentation/slides_advanced.tex
@@ -7,8 +7,8 @@
 \institute{SUBJECT $\cdot$ LOCATION}
 \date{}
 
-\begin{document}
 
+\begin{document}
 \maketitle
 
 \section[FIRST SECTION]{SECTION} % title and subtitle reversed
@@ -37,6 +37,7 @@
   \end{center}
 \end{frame}
 
+
 \appendix
 \begin{frame}{Sources}
   \begin{itemize}\begin{multicols}{2}