If there's a file named cmsPrefs.opml in the Fargo app folder it's loaded when Fargo starts.

It can contain globals that are available to every website rendered by your copy of Fargo.

It can contain #menus, #glossary, #templates, basically anything that could appear in any website outline.

If you make a change to the file, it's automatically reloaded, so your changes are reflected immediately.

Here's what's in my cmsPrefs.opml file: