[O] Placement of \makeatletter with address@hidden

[Loris Bennett]

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 address@hidden

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?

Cheers,

Loris

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