Adding a banner
Changing the banner image or uploading your own
To change the banner image, or choose another go to site settings, then layout. If there are alternate banners available then you can pick one here, or upload your own (It is important that the picture is as near as possible to the specified dimensions. If not the template may not behave correctly)
If there are no banners available then the image then needs to be uploaded in the usual way to the AV/images library. Afterwards all you have to do is copy the image code and paste it in the middle section of the banner area in settings/pagelayout. The option to do this is only available on larger sites.
N.B. This can be done to any template, though it would require that the image
is exactly of size, otherwise the original will show through.