From mboxrd@z Thu Jan  1 00:00:00 1970
From: James Harkins <jamshark70@gmail.com>
Subject: BEAMER_act and special environments
Date: Mon, 11 Nov 2013 11:14:20 +0800
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To: orgmode <emacs-orgmode@gnu.org>

Hi,

I'm not especially familiar with emacs-lisp and I haven't looked at the=20
functions for node properties at all. Unfortunately, I'm under a time=20
crunch today and I don't have the few hours it would take to get up to=20
speed (otherwise, I'd have a go at it myself).

It seems that everything in org-beamer-environments-default supports=20
overlay specifications, except beamercolorbox. OK... what about=20
org-beamer-environments-special? I found today that B_columns ignores any=20
overlay specification given in the heading's properties. That is:

**** Header=09=09=09=09=09=09=09  :B_columns:
     :PROPERTIES:
     :BEAMER_env: columns
     :BEAMER_act: 2-
     :END:
(... with some BMCOL headings underneath...)

-->

\begin{columns}
.. blah blah...
\end{columns}

.. where I would have hoped for "\begin{columns}<2->"

I was able to work around the limitation by wrapping the "columns"=20
environments within "onlyenv" environments. But it seems to me that it=20
might be nicer to be able to write the overlay directly into the affected=20
environment.

I don't mind poking around the code, but I'd need some tips. I can see=20
where B_columns gets formatted, but I'm not clear how to check for a=20
BEAMER_act property.

Thanks,
hjh