You can change the look of the server buffer lines by changing the
gnus-server-line-format variable. This is a format-like
variable, with some simple extensions:
How the news is fetched—the back end name.
The name of this server.
Where the news is to be fetched from—the address.
The opened/closed/denied status of the server.
Whether this server is agentized.
The mode line can also be customized by using the
gnus-server-mode-line-format variable (see Mode Line Formatting). The following specs are understood:
Server name.
Server method.
Also see Formatting Variables.