Many thanks for your replies. It helps. I will try to be more precise later
on with an example. I do not forget this thread that I have opened. I will
have soon a talk and a paper to publish on the base of this talk, I will
goint to start  with an org file.

Sorry for the delay of my reply.

I like org-mode . ;)

Best wishes,

Jo.




2014/1/20 Bastien <bzg@altern.org>

> Nicolas Goaziou <n.goaziou@gmail.com> writes:
>
> > This is already possible on a case by case basis :
> >
> >  - @@beamer:<1->@@ Item
> >  - @@beamer:<2->@@ ...
> >
> > and as a frame property:
> >
> >   * Headline
> >     :PROPERTIES:
> >     :BEAMER_ACT: [+-]
> >     :END:
> >
> >     - item
> >     - item
>
> Great!  Thanks for this :)
>
> --
>  Bastien
>