Hello,
To enable the Classic Widgets Panel, please navigate to Theme Options > General and set the Enable Classic Widgets Panel option to On. Then, go to Appearance > Widgets and edit content of Header banner area.
If this is not what you are looking for, please provide a screenshot of the banner.
You can use Lightshot screenshot or Gyazo tool to make screenshots and share the links here, or you can use a file sharing service such as WeTransfer https://wetransfer.com/
Kind Regards,
8theme team