2. Select the image you want to post by clicking on its thumbnail. This will produce a page like below.
3. The toolbar on the side will provide two copy links with the correct BBCode script to paste into a forum dialogue box. You should probably consider selecting a thumbnail size from the options below unless you have already resized the image in a photoshop program (and maybe still anyway). Otherwise imgur defaults to the original size of your photo, and it will probably be huge.
