\documentclass{article}

\usepackage{geometry}
\usepackage[dutch]{babel}

\geometry{
	paperwidth=9cm,
	paperheight=7.5cm,
	margin=0.0cm
}

\title{Test}
\begin{document}
	\section{AA}
	Lorem ipsum dolor sit amet,
	consectetur adipiscing elit.

	\section{BB}
	\subsection{CC}
	\subsubsection{DD}
	\subsection{EE}
	\textbf{Opdracht:} Nullam
	a risus at arcu lobortis
	\textit{viverra vel}.

	\section{FF}
	\subsubsection{GG}
\end{document}