Variable: gnus-topic-indent-level
gnus-topic-indent-level is a customizable variable defined in
gnus-topic.el.gz.
Value
2
Documentation
How much each subtopic should be indented.
Source Code
;; Defined in /usr/src/emacs/lisp/gnus/gnus-topic.el.gz
(defcustom gnus-topic-indent-level 2
"How much each subtopic should be indented."
:type 'integer)