# Why does using achemso turn off bookmarks?

I like using sections as bookmarks when editing. However, when I use achemso it turns these off.

MWE1 produces bookmarks properly.

%\documentclass[journal=cgdefu]{achemso}
\documentclass{article}

\usepackage{hyperref}

\title{This is a title}
\author{Canageek}
%\affiliation{Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, B.C., Canada}
%\email{This is an email}
\date{}

\begin{document}
\maketitle
\section{Introduction}
\section{Experimental}

\end{document}


MWE2, however, does not:

\documentclass[journal=cgdefu]{achemso}
%\documentclass{article}

\usepackage{hyperref}

\title{This is a title}
\author{Canageek}
\affiliation{Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, B.C., Canada}
\email{This is an email}
\date{}

\begin{document}
\maketitle
\section{Introduction}
\section{Experimental}

\end{document}


The standard settings in achemso turn off section numbers by effectively making \section behave like \section*. You therefore need to use \SectionNumbersOn to enable section numbering: this will also generate PDF bookmarks for the sections. If you want numberless sections but also want \SectionNumbersOn then you'll need to use \section* in place of \section, as in any other document.