Variable: image-dired-external-viewer

image-dired-external-viewer is a customizable variable defined in image-dired.el.gz.

Value

nil

Documentation

Name of external viewer.

Including parameters. Used when displaying original image from image-dired-thumbnail-mode.

This variable was added, or its default value changed, in Emacs 28.1.

Source Code

;; Defined in /usr/src/emacs/lisp/image-dired.el.gz
(defcustom image-dired-external-viewer
  ;; TODO: Use mailcap, dired-guess-shell-alist-default,
  ;; dired-view-command-alist.
  (cond ((executable-find "display"))
        ((executable-find "xli"))
        ((executable-find "qiv") "qiv -t")
        ((executable-find "feh") "feh"))
  "Name of external viewer.
Including parameters.  Used when displaying original image from
`image-dired-thumbnail-mode'."
  :version "28.1"
  :type '(choice string
                 (const :tag "Not Set" nil)))