Variable: rmail-summary-line-count-flag
rmail-summary-line-count-flag is a customizable variable defined in
rmailsum.el.gz.
Value
t
Documentation
Non-nil means Rmail summary should show the number of lines in each message.
Setting this option to nil might speed up the generation of summaries.
Source Code
;; Defined in /usr/src/emacs/lisp/mail/rmailsum.el.gz
;; FIXME could do with a :set function that regenerates the summary
;; and updates rmail-summary-vector.
(defcustom rmail-summary-line-count-flag t
"Non-nil means Rmail summary should show the number of lines in each message.
Setting this option to nil might speed up the generation of summaries."
:type 'boolean
:group 'rmail-summary)