title: How to enlarge latex fragments in org mode at the same time as the buffer text?
body: <p>I'm using <code>org-mode</code> in emacs, but I think the question is also relevant for <code>auctex</code> users.</p>
  
  <p>In <code>org-mode</code> you can show latex fragments, as the <a href="http://orgmode.org/manual/Previewing-LaTeX-fragments.html" rel="nofollow">manual</a> demonstrates.</p>
  
  <p>But: these fragments (mostly math formulae) seem to have <em>constant</em> size.  When I type <code>C-x C-+</code> or <code>C-x C--</code> <em>only</em> the buffer text size changes.  How can I change the fragments size from the buffer?</p>
  
  <p>(I know I can make the fragments larger or smaller with <code>org-format-latex-options</code>, but this is permanent. I want to change the size of the fragments (the png files) like the text.)</p>