Variable: gnus-thread-indent-level
gnus-thread-indent-level is a customizable variable defined in
gnus-sum.el.gz.
Value
4
Documentation
Number that says how much each sub-thread should be indented.
Source Code
;; Defined in /usr/src/emacs/lisp/gnus/gnus-sum.el.gz
(defcustom gnus-thread-indent-level 4
"Number that says how much each sub-thread should be indented."
:group 'gnus-thread
:type 'integer)