Variable: ibuffer-use-header-line
ibuffer-use-header-line is a customizable variable defined in
ibuffer.el.gz.
Value
t
Documentation
If non-nil, display a header line.
If the variable's value is t, the header line displays the current
filters. For the value title, display the column titles.
Probably introduced at or before Emacs version 31.1.
Source Code
;; Defined in /usr/src/emacs/lisp/ibuffer.el.gz
(defcustom ibuffer-use-header-line t
"If non-nil, display a header line.
If the variable's value is t, the header line displays the current
filters. For the value `title', display the column titles."
:type '(choice boolean (const :tag "Column titles" :value title)))