Am 29.11.18 um 14:07 schrieb Loris Bennett:
> Eric S Fraga <esfli...@gmail.com> writes:
>
>> On Thursday, 29 Nov 2018 at 09:38, Julius Dittmar wrote:
>>> Am 29.11.18 um 09:13 schrieb Julius Dittmar:
>>>> Am 29.11.18 um 08:17 schrieb Loris Bennett:
>>>>>> #+latex_header:
>>>>>> \makeatletter\let\mytextheight\beamer@frametexheight\makeatother
>>>>>> #+attr_latex: :height 0.75\mytextheight
>>>
>>> Oh, or perhaps just a typo is involved: is it really
>>> \beamer@frametexheight or rather \beamer@frametextheight you are chasing
>>> after?
>>
>> Also, you may need to define your mytextheight as a length and then use
>> \setlength instead of \let.
>
> After correcting the typo I followed Eric's and Julius's suggestions and
> I tried adding
>
> #+LATEX_HEADER:
> \newlength\mytextheight\makeatletter\setlength\mytextheight{\beamer@frametextheight}\makeatother
>
> to the beginning of the Org file, but in this case
>
> \the\mytextheight
> > is 0.0pt.
That's what I suspected. You could try to wrap this line in an
#+begin_export latex block (as I suggested), then it will be within the
document instead of in the preamble.
I usually refrain from using AtBeginDocument hooks (Gustavo Barros'
suggestion) because I do not know enough about them, so I rather add the
commands to a place I can see ;-)
> After that I tried adding the definition on the slide itself
>
> #+BEGIN_SRC latex
>
> \newlength\mytextheight\makeatletter\setlength\mytextheight{\beamer@frametextheight}\makeatother
> #+END_SRC
Hm, src-block? I would have thought you should wrap that in an
export-block, so those commands get added to the exported document, not
quoted within as a source code. That would mean
#+begin_export latex
\newlength\mytextheight\makeatletter\setlength\mytextheight{\beamer@frametextheight}\makeatother
#+end_export
HTH,
Julius
