Gnus: How to get/force specific header entries in a new message?

[Marius Hofert]

Hi,

When I open a new message, it has the following message head:

To:
Subject:
From: My Name <my.name@uni.edu>
Gcc: nnfolder+archive:sent.2011-11

I saw on 
http://www.gnu.org/software/emacs/manual/html_node/gnus/Hiding-Headers.html 
that I can specify which headers are visible via something like:

(setq gnus-visible-headers 
"^From:\\|^Newsgroups:\\|^Subject:\\|^Date:\\|^Followup-To:\\|^Reply-To:\\|^Organization:\\|^Summary:\\|^Keywords:\\|^To:\\|^[BGF]?Cc:\\|^Posted-To:\\|^Mail-Copies-To:\\|^Mail-Followup-To:\\|^Apparently-To:\\|^Gnus-Warning:\\|^Resent-From:")

That's the default of gnus-visible-headers. However, comparing with the above, 
one sees that not all of these headers/entries are actually displayed… How can 
I specify that the following headers are always shown in a new message?

To:
Cc:
Bcc:
Subject:
From:
Date:

[I already read that with gnus-sorted-header-list one can order the entries 
such that they appear in the above order, so that should not be a problem]

Cheers,

Marius

PS: Most likely the last Gnus question for today :-)