If you mean to add pictures to a post there should be a button for that along side the font styles when your writing your posts.
well just click the "add picture" button in when you're making a new post. And upload in there. It's usually located beside the fonts, add Link button and beside the add video button too.
there's a button in the post edit/create stuff, piece of cake to post a pic :)
There is a like a land scape image next to the movie sign in your post box, click that and you can use a url or upload it. Good luck.