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\section{Quick Intro}  \authorea has deployed a new backend for its \latex input language, teaming up with the ambitious \latexml project, which strives to offer a full reimplementation of {\TeX} with targeted generation of web-first manuscripts, supporting HTML5 and ePub. Note: \latexml is the default engine for rendering {\TeX} in Authorea Beta articles. You can emust ensure it is must  be enabled on a per-article basis. Select the following option from your \textbf{article page}: \begin{center}  $\cdots$ topbar menu → Settings → More Preferences → LaTeX Support → LaTeXML  \end{center}