image-mode has several new features. Now you can use it as a image viewer.
Open a image in your photos folder. (call
dired to open a dir, then Enter ↵ on a image file to open in image mode. 〔☛ dired tutorial〕)
image-next-file) to view next image.
image-previous-file) to view previous image.
When viewing a gif animation:
image-next-frame) for next frame.
image-previous-frame) for previous frame,
image-goto-frame) to go to a specific frame.
Here's a gif file you can play with, at vi_clippy_assistant.gif.
describe-mode 【F1 m】 to see all commands.
To delete current image, you can use Emacs Lisp: Delete Current File.