Basically, what you’d like is to add a new link in the navigation bar along FAQ, Terms of Service and Privacy.
I believe this can’t be done without creating a new theme component (which requires coding using Discourse’s JS API).
However, a very circumvoluted way would be:
Either
-
enable page publishing site setting, create a new topic in a private category (for example
#staff), fill it with your imprint. Publish your page.
or
- Create a new public topic in a public category and fill in it with your imprint.
Then,
-
Set the faq url setting to your published page or topic’s URL
-
Since we’ll use the FAQ links to show this legal content, customize the original text with more proper labels (e.i., “FAQ” → “Legal”) in Customize → Text → search for the “faq” string.
Result:
Circumvoluted, as I said… 