Variable: gnus-kill-summary-on-exit
gnus-kill-summary-on-exit is a customizable variable defined in
gnus-sum.el.gz.
Value
t
Documentation
If non-nil, kill the summary buffer when you exit from it.
If nil, the summary will become a "*Dead Summary*" buffer, and it will be killed sometime later.
Source Code
;; Defined in /usr/src/emacs/lisp/gnus/gnus-sum.el.gz
(defcustom gnus-kill-summary-on-exit t
"If non-nil, kill the summary buffer when you exit from it.
If nil, the summary will become a \"*Dead Summary*\" buffer, and
it will be killed sometime later."
:group 'gnus-summary-exit
:type 'boolean)