From mboxrd@z Thu Jan  1 00:00:00 1970
From: Matt Lundin <mdl@imapmail.org>
Subject: Re: org-beamer: How to get items appear sequentially rather than all
 at once
Date: Tue, 23 Mar 2010 20:01:27 -0400
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In-Reply-To: <4BA94D16.6090908@gmail.com> (Christian Wittern's message of
	"Wed, 24 Mar 2010 08:21:58 +0900")
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To: Christian Wittern <cwittern@gmail.com>
Cc: Org Mode Mailing List <emacs-orgmode@gnu.org>

Hi Christian,

Christian Wittern <cwittern@gmail.com> writes:

> On 2010-03-24 1:08, Thomas S. Dye wrote:
>>
>>
>> Aloha Christian,
>>
>> Please see the beamer documentation for
>> \beamerdefaultoverlayspecification.  You can likely set it to yield
>> the behavior you're after.
>>
> Thomas,
> Hmm, there does not seem to be such a thing as
> \beamerdefaultoverlayspecification.  The only place where default
> overlays are mentioned is in connection with BEAMER_envargs.  But when
> I try the following, I do not get the expected results:

Try the following:

> #+STARTUP: beamer
> #+LaTeX_CLASS: beamer
> #+LaTeX_CLASS_OPTIONS: [presentation]
> #+BEAMER_FRAME_LEVEL: 1
> #+BEAMER_HEADER_EXTRA: \usetheme{default}\usecolortheme{default}
> #+COLUMNS: %40ITEM %10BEAMER_env(Env) %10BEAMER_envargs(Env Args)
> %4BEAMER_col(Col) %8BEAMER_extra(Extra)
> #+OPTIONS: toc:nil
>
> * Frame 1 
> :PROPERTIES:
> :BEAMER_envargs: [<+->]
> :END:
> ** This point should appear first
> ** And this point should be second
>

You need to set the default overlay argument on the frame (i.e., [<+-]).
This instructs LaTeX to create slides that reveal the items in the frame
one by one.

If you want to enable this behavior for all slides, you can place the
following line before the first heading:

#+beamer: \beamerdefaultoverlayspecification{<+->}

See section 9.6.3 of the beamer manual (Action Specifications) for more
details.

Best,
Matt