Re: multiple EXPORT_LATEX_HEADER lines

[Eric S Fraga]

On Friday, 12 Jun 2020 at 14:01, Jeremie Juste wrote:
> But I have some more questions. I can see the :EXPORT_LATEX_HEADER in
> the properties menu. (C-x p) but how did you even find :EXPORT_LATEX_HEADER+
> property name?

This is a standard syntax for adding values to a property.  From the info 
manual:

If you want to add to the value of an existing property, append a ‘+’ to
the property name.  The following results in the property ‘var’ having
the value ‘foo=1 bar=2’.

     #+PROPERTY: var  foo=1
     #+PROPERTY: var+ bar=2

-- 
: Eric S Fraga via Emacs 28.0.50, Org release_9.3.7-636-gaa32f6