On Wednesday, 17 May 2017 at 13:45, Jérémie Juste wrote:
> Hello
> I apologise for the wrong info. it seams that I should reread the manual myself.
>
> M-x org-beamer-mode,
>
> Then C-c C-e l P

The first bit I think is not necessary but simply helps with respect to
key bindings for special tags;

The important thing is the key sequence given for exporting to the
beamer target (b, P or O for LaTeX source, PDF or PDF&open).

-- 
: Eric S Fraga (0xFFFCF67D), Emacs 26.0.50, Org release_9.0.6-425-gf4fca1