Here's the example I got from Ivan which worked. You could consider adding it as a 2nd example in a sub's custom CSS section if you are so inclined.
body .sbimg {
height: 200px;
background: url(%%YourPictureNameHere%%) no-repeat center/contain;
}
Yeah, this is basic css, not specifically related to poal.
There are tons of examples, online.
You can search for "make a banner image with css"
/s/poaldev has a sidebar image for each mode (day/grey/dark). Check out the css code in the page source.
(post is archived)