Thanks for the help. I figured this was probably in the docs somewhere,
but one of the difficulties I have with gnus (the main difficulty, which
is nested inside the main advantage of gnus) is that there are so many
options and settings that I always have difficulty finding the right
item in the documentation. So, thanks for that.

Also, I notice that on this list (and on the main emacs list) many of
you emacs adepts provide doc or code snippets (as below) in a neat
little formatted block. I assume, being emacs adepts, that you do not
type in all those little dashes and vertical lines. You have a function,
surely, that does all the legwork for you. And it's probably called
something like region-format-as-extract, and you probably have a
shortcut key for it, like 'C-c fae', and so on. So, how do I do that?

Cheers.

Ross