[RedHacker]

Originally Posted by MarkFL

Those are vastly different aspect ratios. Try adding this selector to your "additional.css" template:

.doc_header {
	background: url(image url goes here);
	background-size: 100%;
	background-repeat: no-repeat;
}

This way, the image width will fill the parent, and the height will be set to auto to preserve the original aspect ratio.

Not worked MarkFL....