If you would like to put a header graphic, image, or photo at the top of your forum, just follow these steps:
1. Click 'Forum Admin' at the top left of your forum
2. Click the 'Themes' tab, then click 'Colors & Images' (note some themes, such as 'classic' don't support header images at the moment)
3. Click 'Browse' to select a file from your computer, we recommend a header image that is about 990 x 170. You may need to resize your image on your computer so that it displays properly.
HINT: Here's a free online tool for resizing and editing images: http://snipshot.com/