On most forums, there are a bunch of questions on how to post a picture up on here. Its simple. Just follow these steps to perfection

1). Make sure you already saved the image on your computer/laptop.
2). Press the Tree icon
3). After you've pressed that press browse, then search for your image
4). Then press host.
5). Now there will be a screen with a bunch of links. Highlight the one below Image url
6). Now press the icon with ONLY THE TREE
7). Paste your link that you copied earlier and put it in the slot thing.
Last Step). Press okay and your image is up!

Hope I helped!
~Have a great time!