Variable: gnus-no-mark
gnus-no-mark is a customizable variable defined in gnus-sum.el.gz.
Value
32
Documentation
Mark used for articles that have no other secondary mark.
This variable was added, or its default value changed, in Emacs 22.1.
Source Code
;; Defined in /usr/src/emacs/lisp/gnus/gnus-sum.el.gz
(defcustom gnus-no-mark ? ;Whitespace
"Mark used for articles that have no other secondary mark."
:version "22.1"
:group 'gnus-summary-marks
:type 'character)