Le 02/11/2014 à 20h45, Nicolas Goaziou a écrit :
> Hello,
>
> "Garreau, Alexandre" <galex-713@galex-713.eu> writes:
>
>> Hello, I’d like to being able to preview chemfig, like lines beginning
>> with \chemfig{.
>>
>> But (a) they’re not detected as LaTeX fragments by the previewer (and it
>> seems only some matchers are accepted by default, I can’t say, for
>> instance, “^{\\[a-zA-Z]*[a-zA-Z0-9 ].*}$”), and (b) when previewing I
>> don’t see any way to include packages, like “\usepackage{chemfig}”, so
>> that even “\begin{flushleft}<\n>\chemfig{O=O}<\n>\end{flushleft}”, for
>> instance, doesn’t work.
>
> Have you tried
>
>   #+LATEX_HEADER: \usepackage{chemfig}

Yes. I think it doesn’t influence the preview system.