# How can I add margin notes on inner side of a page in two sides mode?

How can I add margin notes on inner side of a page only for even pages in two sides mode?

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Use \reversemarginpar to change to side of \marginpars. This is an global setting, i.e. won't be limited to the current group/environment. However \normalmarginpar switches back to the normal side.

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The KOMA-Script classes offer the option twoside=semi which will typeset running headers/footers like in twoside mode, but set page margins and position \marginpars as if in oneside mode (i.e., "on [the] inner side of a page only for even pages").

\documentclass[twoside=semi]{scrbook}

\usepackage{lipsum}

\begin{document}

\chapter{foo}

\section{bar}

Some text.\marginpar{Some text.} \lipsum[1-5]

Some text.\marginpar{Some text.} \lipsum[1-5]

\end{document}

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