Eric, Just retried and was able to get it to work. Perhaps someone should add this to the ob-doc-latex page? For reference, I tried each of the following: Works: 1) #+begin_src latex :headers \renewcommand{\rmdefault}{cmss} Doesn't work: 2) #+begin_src latex :headers '("\\renewcommand{\rmdefault}{cmss}") Works: 3) #+begin_src latex :headers '("\\usepackage{mathpazo}") Which was puzzling me about #2 which led me to try: Works: 4) Doesn't work: 2) #+begin_src latex :headers '("\\renewcommand{\\rmdefault}{cmss}") Note the second double backslash before rmdefault. That escape character was necessary there, too. Thanks for the help on this!! It's *perfect*. John