From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric S Fraga <esflists@gmail.com>
Subject: Re: Placement of \makeatletter with \beamer@frametextheight
Date: Wed, 28 Nov 2018 15:37:26 +0000
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References: <87a7lts0gv.fsf@hornfels.zedat.fu-berlin.de>
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In-Reply-To: <87a7lts0gv.fsf@hornfels.zedat.fu-berlin.de> (Loris Bennett's
	message of "Wed, 28 Nov 2018 16:09:20 +0100")
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To: Loris Bennett <loris.bennett@fu-berlin.de>
Cc: emacs-orgmode@gnu.org

On Wednesday, 28 Nov 2018 at 16:09, Loris Bennett wrote:
> Hi,
>
> I want to specify the size of a graphic in an Beamer presentation
> generated from my org file.  The following
>
>   #+ATTR_LATEX: :height 0.75\textheight
>
> works, but
>
>   #+ATTR_LATEX: :height 0.75\beamer@frametextheight
>
> I get the error
>
>   ! Undefined control sequence.
>   \Gin@@eheight ->0.5\beamer 
>                              @frametextheight
>
> I assume I need to insert a \makeatletter at the appropriate point.
> Where would that be?

You might find it easier to create your own variable in the header of the LaTeX file and use that directly, as in (untested):

#+latex_header: \makeatletter\let\mytextheight\beamer@frametexheight\makeatother

...

#+attr_latex: :height 0.75\mytextheight

-- 
Eric S Fraga via Emacs 27.0.50, Org release_9.1.14-1035-gfeb442