From mboxrd@z Thu Jan  1 00:00:00 1970
From: Suvayu Ali <fatkasuvayu+linux@gmail.com>
Subject: Re: Beamer export with \only overlays - how?
Date: Wed, 9 Oct 2013 09:23:28 +0200
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On Wed, Oct 09, 2013 at 02:28:30AM +0000, James Harkins wrote:
> Suvayu Ali <fatkasuvayu+linux <at> gmail.com> writes:
> 
> > On Tue, Oct 08, 2013 at 11:41:36PM +0800, James Harkins wrote:
> > > Question: How does one use Beamer's \only command with blocks?
> (Successfully, with org-mode's beamer
> > export, I mean.)
> > > 
> > > I found in the manual that you can give an overlay specification using
> > > the BEAMER_ACT property... ok... but that's not the same as \only
> > > because, when a latex chunk is marked \only<1>, it takes *no space* on
> > > <2->. Using <1> and <2> causes the <2> to appear lower than the
> > > <1>. That's not what I want.
> > > 
> > 
> > Did you try this:
> > 
> > <http://orgmode.org/worg/exporters/beamer/ox-beamer.html#environments-overlay>
> 
> My example file uses BEAMER_ACT, so yes, I did try that. Here's what happens
> if I try it with \only<1>.

Look a bit more carefully ;).  The following paragraph has an example
suggesting the onlyenv environment.  As far as I understand,
environments are prefered over commands with arguments or macros when
translating headlines.  You can nest your block in such an environment.
I realise this is a little less flexible than \only{}, but it seems to
work.  I have not tried any of this personally in a long time though.

Hope this helps,

-- 
Suvayu

Open source is the future. It sets us free.