On Thursday, 18 Jan 2018 at 22:09, Thibault Marin wrote:
> Thanks, if there is a mechanism to alter the preamble when creating the
> image, that may be a preferable approach.  I'll try to look into this.

Have a look at org-format-latex-header.

-- 
Eric S Fraga via Emacs 27.0.50, Org release_9.1.6-352-g92176c