You can do it either way, providing you use a full URL to the image. Here's an example of the description field in my test forum (with HTML box checked):
<img src="http://gregtest.991552.n3.nabble.com/file/n2543944/gregchapmansmall.jpg">
Forum description here.
You will probably need additional arguments to place the image where you want it. you can also do it via CSS like this:
#forum-header {
height: 200px;
background-image: url(http://gregtest.991552.n3.nabble.com/file/n2543944/gregchapmansmall.jpg);
background-repeat: repeat-x;
}
The image is posted within a message on the forum and it's URL found by right-clicking in my browser, but there also no reason why you cannot use an image found on any other site. For example the CSS code for the forum embedded at:
http://www.ukhbbr.plus.com/forum.htmlincludes:
#forum-header {
height: 229px;
background-image: url(http://i906.photobucket.com/albums/ac268/seahawk-17/ukhbbr/ukhbbrbackground.jpg);
background-repeat: no-repeat;
}
Volunteer Helper - but recommending that users move off the platform!
Once the admin for GregHelp now deleted.