Variable: rmail-show-message-verbose-min
rmail-show-message-verbose-min is a customizable variable defined in
rmail.el.gz.
Value
200000
Documentation
Message size at which to show progress messages for displaying it.
This variable was added, or its default value changed, in Emacs 23.1.
Source Code
;; Defined in /usr/src/emacs/lisp/mail/rmail.el.gz
(defcustom rmail-show-message-verbose-min 200000
"Message size at which to show progress messages for displaying it."
:type 'integer
:group 'rmail
:version "23.1")