Authorea features LaTeXML, the most powerful way to render LaTeX notation on the web. This is an up to date list of all latex packages you can use on Authorea.

In order to use a specific LaTeX package, you need to include it, so that Authorea loads it for you.

To do this follow these steps:

In your document toolbar, click on the cogs (⚙️) in the right end, and select Edit Macros.
If the package you want to add is for example siunitx, add this line in the macros file:
\usepackage{siunitx}
Save and go back to the Document view where you can now type in a LaTeX block, for example, \si{\meter} which will render as m.
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