From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nick Dokos <nicholas.dokos@hp.com>
Subject: Re: setting org-export-latex-image-default-option on a per file
 basis?
Date: Tue, 09 Feb 2010 21:23:04 -0500
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References: <m2aavi6t0t.fsf@hades.lhinman.com> <874olpc0ik.fsf@stats.ox.ac.uk>
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In-reply-to: Message from Dan Davison <davison@stats.ox.ac.uk> of
	"Tue, 09 Feb 2010 21:01:07 EST." <874olpc0ik.fsf@stats.ox.ac.uk>
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To: Dan Davison <davison@stats.ox.ac.uk>
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Dan Davison <davison@stats.ox.ac.uk> wrote:

> Lee Hinman <hinman@gmail.com> writes:
> 
> > Hi all,
> >
> > I'm using org-babel-ditaa to insert a picture into a document I am
> > writing. This works great, except the inserted image is too small.  By
> > changing the -s option to ditaa I was able to modify the size of the
> > image for the HTML export but not for the LaTeX.  I did a little looking
> > at the .tex file and found this:
> >
> > \includegraphics[width=10em]{before1.png}
> >
> > the width=10em is controlled by org-export-latex-image-default-option.
> > Ideally I'd like to change this value for this file only, something
> > like an entry in the #+OPTIONS line.  But org-export-plist-vars has that
> > element set to nil so it isn't configurable via that method.  Does
> > anyone have a suggestion of how I could tweak this variable on a per
> > file basis?
> 
> Hi Lee,
> 
> I was just having the same problem. We can use a file-local variable,
> for now. 
> 
> # Local Variables:
> # org-export-latex-image-default-option: "width=30em"
> # End:
> 
> This goes "near the end of the file" according to 
> http://www.gnu.org/software/emacs/manual/html_node/emacs/Specifying-File-Variables.html#Specifying-File-Variables.
> 
> Dan
> 

You should also be able to use BIND for this:

#+BIND: org-export-latex-image-default-option "width=30em"

should do it. I think this should work but I have not tested it.

HTH,
Nick