Minor edits.

.doom.d/config.el

@@ -34,9 +34,24 @@
          :leader
          :desc "Dired view file"
          "d v" #'dired-view-file)))
-(evil-define-key 'normal peep-dired-mode-map (kbd "j") 'peep-dired-next-file
-                                             (kbd "k") 'peep-dired-prev-file)
+;; Make 'h' and 'l' go back and forward in dired. Much faster to navigate the directory structure!
+(evil-define-key 'normal dired-mode-map
+  (kbd "h") 'dired-up-directory
+  (kbd "l") 'dired-open-file) ; use dired-find-file instead if not using dired-open package
+;; If peep-dired is enabled, you will get image previews as you go up/down with 'j' and 'k'
+(evil-define-key 'normal peep-dired-mode-map
+  (kbd "j") 'peep-dired-next-file
+  (kbd "k") 'peep-dired-prev-file)
 (add-hook 'peep-dired-hook 'evil-normalize-keymaps)
+;; Get file icons in dired
+(add-hook 'dired-mode-hook 'all-the-icons-dired-mode)
+;; With dired-open plugin, you can launch external programs for certain extensions
+;; For example, I set all .png files to open in 'sxiv' and all .mp4 files to open in 'mpv'
+(setq dired-open-extensions '(("gif" . "sxiv")
+                              ("jpg" . "sxiv")
+                              ("png" . "sxiv")
+                              ("mkv" . "mpv")
+                              ("mp4" . "mpv")))
 
 (setq doom-theme 'doom-one)
 (map! :leader