For pictures : First you would click Spoiler Then this would pop out Spoiler And you put the Image URL. (You can upload the picture to https://imgur.com/ then into the Image URL) For Gifs : Also if you want to put pictures or Gifs on walls like this, Spoiler You type this : Spoiler
@Bunny561 I wasn't sure if anyone has answered it yet and if this is what you meant by adding pictures. But I hope this helps.