You could just use regular links for this. You could setup a face function that changes the color depending on it being internal or external, or you could make separate links for them. See http://kitchingroup.cheme.cmu.edu/blog/2016/11/04/New-link-features-in-org-9/ for many examples of what kinds of things can be done. John ----------------------------------- Professor John Kitchin Doherty Hall A207F Department of Chemical Engineering Carnegie Mellon University Pittsburgh, PA 15213 412-268-7803 @johnkitchin http://kitchingroup.cheme.cmu.edu On Wed, Dec 13, 2017 at 6:56 AM, Sharon Kimble wrote: > > For my current series of books that I'm writing in org-mode which is > being exported to latex, I need to differentiate between recipes in the > current working file, and to recipes in an external file. This is in a > series of books all containing recipes. So what I'm looking for is the > ability to use a single underline for internal, and a double underline > for external. I can do a single underline easily in org-mode, but I'm > having problems with a double underline. > > But is it the best method, using single and double underlines? Can > anyone suggest some other ways of doing it, please? Like, for instance, > can I have a reference to a particular section in another file? > > Thanks > Sharon > -- > A taste of linux = http://www.sharons.org.uk > TGmeds = http://www.tgmeds.org.uk > DrugFacts = https://www.drugfacts.org.uk > Debian 9.3, fluxbox 1.3.5-2, emacs 25.3.2, org-mode 9.1.4-2 >