This manual describes the Dired features provided by the file dired-x.el. To take advantage of these features, you must load the file and (optionally) set some variables.
In your ~/.emacs file, or in the system-wide initialization file default.el in the site-lisp directory, put
(with-eval-after-load 'dired
(require 'dired-x)
;; Set dired-x global variables here. For example:
;; (setq dired-x-hands-off-my-keys nil)
))
(add-hook 'dired-mode-hook
(lambda ()
;; Set dired-x buffer-local variables here. For example:
;; (dired-omit-mode 1)
))
This will load dired-x.el when Dired is first invoked (for example, when you first type C-x d).