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### 2.1 Optional Installation Dired Jump

In order to have `dired-jump` and `dired-jump-other-window` (see Miscellaneous Commands) work before `dired` and `dired-x` have been properly loaded you should set-up an autoload for these functions. In your `.emacs` file put

    (autoload 'dired-jump "dired-x"
      "Jump to Dired buffer corresponding to current buffer." t)

    (autoload 'dired-jump-other-window "dired-x"
      "Like \\[dired-jump] (dired-jump) but in other window." t)

    (define-key global-map "\C-x\C-j" 'dired-jump)
    (define-key global-map "\C-x4\C-j" 'dired-jump-other-window)