Hello, @TFS,
To add the banner on top first you have to create a block in the Dashboard >> Static blocks and then add the content in it as per your need. After that navigate to the Dashboard >> Appearance >> Widgets >> and set that block in the “Header Banner” like this: https://postimg.cc/xqn6Wv5t and then check back to your site after clearing the browser cache.
Regards 8Themes Team.