# How to convert a section (with subsections etc.) into a chapter?

I need to change the structure of my scrbook-document. I want some sections to become chapters and the other way round. But because there are already subsections and subsubsections in the document, I don't want to do this manually. Is there an easier way?

I am using TeXstudio.

Sample:

\documentclass[a4paper, twoside, 12pt]{scrbook}
\begin{document}
\chapter{Introduction}
\subsection{Should be a chapter}
\subsubsubection{another layer}
\subsubsection{Still stuff to say}
\end{document}


should become

\documentclass[a4paper, twoside, 12pt]{scrbook}
\begin{document}
\chapter{Introduction}
\chapter{Now is a chapter}