In a document like this:
Code: Select all
\documentclass[12pt,a4paper,openany,oneside]{book}
\usepackage{fancyhdr}
\pagestyle{fancy}
\usepackage{fontspec}
\defaultfontfeatures{Mapping=tex-text}
\setmainfont{FreeSerif}
\usepackage{polyglossia}
\setmainlanguage{english}
\usepackage{xunicode}
\usepackage{xltxtra}
\usepackage{bookmark}
\begin{document}
\chapter{bla}
\section{bla}
\section{bla}
\end{document}
Thank you very much,