On a per file basis, you can add extra lines to your LaTeX export header by using "#+LATEX_HEADER: ".
(See: http://orgmode.org/org.html#Export-options) To get your custom commands also to work with the preview of LaTeX fragments, you may customise the "org-format-latex-header" variable. Actually I don't know if there is a way to add something to "org-format-latex-header" on a per-file basis... Is there? Cheers, Manuel 2012/6/12 renato <renn...@gmail.com>: > Hi, I'm really enjoying the org-mode + cdlatex combo. One question > though, how can I customize the latex header produced by > org-export-as-latex ? I really need to add some \newcommand and > \newtheorem statements. > > best wishes, > renato >