[Mailman-Users] Editing the options page shown to you when you are not logged in

[Flo]

Dear all,

I want to adapt the member options page when I am *not* logged in. For
example:
https://mail.python.org/mailman/options/mailman-users/debianflo%40gmx.at

The 'Edit the public HTML pages and text files' option at the admin
interface only contains a possibility to adapt the option page for
members who are already logged in.

How can I adapt the page I described first?

Thank you for any help.
Flo.

PS: I am using 2.1.19