title_body: How to use the e-ink Kindle readers to display photos?
upvoted_answer: Older Kindles
  
  On older generation Kindles (with keyboard) it is actually possible out of the box. You just have to store them in a very specific way.
  
  
  Create a folder named pictures in your Kindle's root directory.
  Create folders with arbitrary names for the collections you want to create.
  Copy the images into those collections.
  Press Alt+Z to start the image viewer.
  
  
  You can then use the following shortcuts:
  
  q = zoom in
  w = zoom out
  e = reset zoom
  c = actual size
  f = full-screen
  r = rotate
  nav controller = pan
  page forward and back = cycle through images
  
  
  I tested this some time ago on a Kindle3 keyboard and it worked.
  
  Newer Kindles
  
  I found a post on the Amazon forums. It claims that a similar approach still works on the Kindle Paperwhite.
  
  
  Create a folder named images (not pictures!) in your Kindle's root directory.
  Create folders with arbitrary names for the collections you want to create.
  Copy the images into the collection folders. Make sure that the extension is JPG and not JPEG.
  Select your collection.
  
  
  I do not know how to select the collections, but I assume that they are listed along with normal ebooks. Feel free to add information on whether this works for the K4NT.
  
  Kindle 4th/5th Gen
  
  
  Zip your images. Name the zip what you want the title of this collection to be.
  Copy the zip file to your documents folder.
  Eject the Kindle and you'll find that name in your list of books. Turn pages to browse through the different pictures.