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+../pics/src/18333fig0101-tn.png
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+../pics/src/18333fig0103-tn.png
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diff --git a/introduction/introduction.tex b/introduction/introduction.tex
index 34a27a54120e9c630f06b406c90e2eef81873412..4aacd0e625348ca39dc882408e783691a3848fe5 100644
--- a/introduction/introduction.tex
+++ b/introduction/introduction.tex
@@ -31,9 +31,8 @@
 
 % First page of the presentation.
 \section{Introduction}
-\begin{frame}
-  \frametitle{Version control.}
-
+\subsection{Version control}
+\begin{pframe}
   \emph{The management of changes to documents, computer programs, large web
   sites, and other collections of information.} --- Wikipedia.
   \bigskip
@@ -48,18 +47,16 @@
     \end{itemize}
     \item Enables collaboration.
   \end{itemize}
-\end{frame}
-
-\begin{frame}
-  \frametitle{Why should I use it?}
+\end{pframe}
 
+\subsection{Why should I use it?}
+\begin{pframe}
   For a single user:
   \begin{itemize}
     \item Revert files to a previous state.
     \item Revert the entire project back to a previous state.
     \item Review changes made over time.
     \item Backup.
-    \item \ldots
   \end{itemize}
   \bigskip
   \pause
@@ -70,13 +67,11 @@
     \item Allow multiple people working on the same project at the same time.
     \item Conflict resolution.
     \item See who made which changes at which time.
-    \item \ldots
   \end{itemize}
-\end{frame}
-
-\begin{frame}
-  \frametitle{Why should I not use it?}
+\end{pframe}
 
+\subsection{Why should I not use it?}
+\begin{pframe}
   A list of common excuses:
   \begin{itemize}
     \item It is too much work.
@@ -93,60 +88,53 @@
   \begin{itemize}
     \item I'm too busy rewriting the code I accidentally deleted.
   \end{itemize}
-\end{frame}
-
-\begin{frame}
-  \frametitle{Local repository.}
+\end{pframe}
 
+\subsection{Local repository}
+\begin{pframe}
   \begin{figure}[]
     \begin{center}
       \colorbox{white}{
         \hspace{0.5cm}
-        \includegraphics[height=0.8\textheight]{pics/18333fig0101-tn}
+        \includegraphics[height=0.8\textheight]{18333fig0101-tn}
         \hspace{0.5cm}
       }
     \end{center}
     \caption{Local version control diagram.}
-    \label{}
   \end{figure}
-\end{frame}
+\end{pframe}
 
-\begin{frame}
-  \frametitle{Central repository.}
-  
+\subsection{Central repository}
+\begin{pframe}
   \begin{figure}[]
     \begin{center}
       \colorbox{white}{
         \hspace{0.5cm}
-        \includegraphics[height=0.8\textheight]{pics/18333fig0102-tn}
+        \includegraphics[height=0.8\textheight]{18333fig0102-tn}
         \hspace{0.5cm}
       }
     \end{center}
     \caption{Centralised version control diagram.}
-    \label{}
   \end{figure}
-\end{frame}
-
-\begin{frame}
-  \frametitle{Distributed repositories.}
+\end{pframe}
 
+\subsection{Distributed repositories}
+\begin{pframe}
   \begin{figure}[]
     \begin{center}
       \colorbox{white}{
         \hspace{0.5cm}
-        \includegraphics[height=0.8\textheight]{pics/18333fig0103-tn}
+        \includegraphics[height=0.8\textheight]{18333fig0103-tn}
         \hspace{0.5cm}
       }
     \end{center}
     \caption{Distributed version control diagram.}
-    \label{}
   \end{figure}
-\end{frame}
+\end{pframe}
 
 \section{Git}
-\begin{frame}
-  \frametitle{The name.}
-
+\subsection{The name}
+\begin{pframe}
   \emph{Git (n): A person who is deemed to be despicable or contemptible.} ---
   WordNet.
   \bigskip
@@ -155,11 +143,10 @@
   \emph{I'm an egotistical bastard, and I name all my projects after myself.
   First ``Linux'', now ``git''.} --- Linus Torvalds.
   \bigskip
-\end{frame}
-
-\begin{frame}
-  \frametitle{History.}
+\end{pframe}
 
+\subsection{History}
+\begin{pframe}
   Designed to replace the commercial package \emph{BitKeeper}.
   \begin{itemize}
     \item Speed.
@@ -170,12 +157,11 @@
     \item Able to handle large projects like the Linux kernel efficiently
       (speed and data size).
   \end{itemize}
-\end{frame}
+\end{pframe}
 
 \section{Remotes}
-\begin{fframe}
-  \frametitle{A lot of choices.}
-
+\subsection{A lot of choices}
+\begin{pframe}
   GitHub.
   \begin{itemize}
     \item Only free for open source projects.
@@ -196,12 +182,11 @@
 
   \vfill
   \permfoot{https://github.com/}
-\end{fframe}
+\end{pframe}
 
 \section{Practical}
-\begin{fframe}
-  \frametitle{Outline.}
-
+\subsection{Outline}
+\begin{pframe}
   We are going to:
   \begin{itemize}
     \item Create and configure a user account on the GitLab server.
@@ -216,11 +201,11 @@
 
   \vfill
   \permfoot{https://git.lumc.nl/}
-\end{fframe}
+\end{pframe}
 
 \section{Questions?}
 \lastpagetemplate
-\begin{fframe}
+\begin{pframe}
   \begin{center}
     Acknowledgements:
     \bigskip
@@ -228,12 +213,12 @@
 
     Martijn Vermaat
 
-    Zuotian Tatum
+    Wibowo Arindrarto
 
+    Zuotian Tatum
   \end{center}
 
   \vfill
   \permfoot{https://humgenprojects.lumc.nl/trac/humgenprojects/wiki/git}
-\end{fframe}
-
+\end{pframe}
 \end{document}
diff --git a/introduction/pics b/introduction/pics
deleted file mode 120000
index aab18f589c2bd6ece1f561a0a20a0b4e284f1087..0000000000000000000000000000000000000000
--- a/introduction/pics
+++ /dev/null
@@ -1 +0,0 @@
-../pics/
\ No newline at end of file