From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nicolas Goaziou <mail@nicolasgoaziou.fr>
Subject: Re: EXPORT_LATEX_HEADER property
Date: Thu, 03 Mar 2016 16:49:27 +0100
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	(Fabrice Popineau's message of "Thu, 3 Mar 2016 12:58:31 +0100")
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To: Fabrice Popineau <fabrice.popineau@gmail.com>
Cc: "emacs-orgmode@gnu.org" <emacs-orgmode@gnu.org>

Fabrice Popineau <fabrice.popineau@gmail.com> writes:

> In org reference, 12.7.2, it is said that:
>
> =E2=80=98LATEX_HEADER=E2=80=99
> Arbitrary lines added to the preamble of the document, before the =E2=80=
=98hyperref=E2=80=99
> settings. The location can be controlled via org-latex-classes.
>
> Note the plural to lines. How can several lines be specified? AFAICS, if I
> do :
>
> :EXPORT_LATEX_HEADER: \usepackage{mathptmx} % rm & math
> :EXPORT_LATEX_HEADER: \usepackage[scaled=3D0.90]{helvet} % ss
>
> The second line will take precedence over the first one.

The manual reference is about keywords, i.e, #+LATEX_HEADER:. You are
using properties. The two are slightly different.=20

In particular, each value from a #+LATEX_HEADER keyword becomes a new
line whereas new values from properties replace the old ones (hence the
PROP+ syntax).

Long story short: if you want multiple lines, use keywords. There is no
support in multi lines properties in Org. Moreover, the use cases are
sufficiently rare that I don't even think it is worth implementing. In
any case, such implementation should preserve the equivalence explained
before.


Regards,