Headers and footers - I can't figure it out

(I’m using the Scrivener 3 beta 12 for Windows)
Admittedly, I’ve not used Scrivener for very long, but I have a good grasp of most of its functionality by now.

But I simply can’t figure out how to export with headers and footers.

I know about page numbers being excluded when compiling for digital formats, by the way.
I have experimented with various compile templates, including modifying some for my own setups. But no matter what I try, including varying “Compile for”, I never see the headers and footers I have defined.

I’m probably missing something blindingly obvious, but I don’t see what. :cry: