Thanks for the info! Can confirm now that I tried this (I don't usually use 
RStudio). That's an RStudio issue then. My guess is that 'Preview' uses 
tools::Rd2HTML() and that indeed won't automatically understand macros coming 
from mathjaxr (or any add-on package for that matter). This would be an issue 
to raise with the RStudio folks then.

But once a package is installed, the equations are nicely rendered also in the 
RStudio help browser, so that part works.

Best,
Wolfgang

>-----Original Message-----
>From: Helmut Schütz [mailto:helmut.schu...@bebac.at]
>Sent: Wednesday, 13 May, 2020 17:01
>To: Viechtbauer, Wolfgang (SP); tiagooliv...@gmail.com; r-package-devel@r-
>project.org
>Subject: Re: [R-pkg-devel] MathJax for Rd files
>
>Hi Wolfgang,
>
>Viechtbauer, Wolfgang (SP) wrote on 2020-05-13 16:53:
>> Seems like you are using roxygen2. I have little experience with that, as
>all my Rd files are 'handcrafted' (plus 100% organic and biodegradable).
>
>As are mine. ;-)
>In the HTML-preview of RStudio the LaTeX is indeed not parsed. I get it
>only (in the HTML man-page and the PDF) if I build the package.
>
>Helmut
>
>--
>Ing. Helmut Schütz
>BEBAC – Consultancy Services for
>Bioequivalence and Bioavailability Studies
>Neubaugasse 36/11
>1070 Vienna, Austria
>E helmut.schu...@bebac.at
>W https://bebac.at/
>F https://forum.bebac.at/
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