Variable: mode-line-frame-identification
mode-line-frame-identification is a variable defined in
bindings.el.gz.
Value
(:eval (mode-line-frame-control))
Documentation
Mode line construct to describe the current frame.
Source Code
;; Defined in /usr/src/emacs/lisp/bindings.el.gz
;; We need to defer the call to mode-line-frame-control to the time
;; the mode line is actually displayed.
(defvar mode-line-frame-identification '(:eval (mode-line-frame-control))
"Mode line construct to describe the current frame.")