There isn't at the moment. Right now, that's a "power user" feature that requires some experimentation to learn. Just remember to keep a clean copy of your original exported settings to get back to where you started in case you change something to a value that you really don't like (ie break things).
We try and make things in the file as clear as possible, but you do need to experiment a bit. It has over 5,000 lines and probably 1,000 unique settings, so keeping that fully documented is quite a task.
Maybe someone wants to start a user wiki on our site? http://wiki.dynonavionics.com/Main_Page#Next_Generation
We can try and do our best to answer specific questions.