The key v is reserved for users. You can bind it to some command or better use it as a prefix key.
Add a new server (
Edit a server (
Show the definition of a server (
Browse the current server (
Return to the group buffer (
Kill the current server (
Yank the previously killed server (
Copy the current server (
List all servers (
Request that the server scan its sources for new articles
gnus-server-scan-server). This is mainly sensible with mail
Request that the server regenerate all its data structures
gnus-server-regenerate-server). This can be useful if you have
a mail back end that has gotten out of sync.
Compact all groups in the server under point
gnus-server-compact-server). Currently implemented only in
nnml (see Mail Spool). This removes gaps between article numbers,
hence getting a correct total article count.
Some more commands for closing, disabling, and re-opening servers are listed in Unavailable Servers.