Banner (jpeg) in header

Thanks for excellent theme.

What is be best way to have an image (jpeg) banner covering the width of page above or below the menu. It is addition to logo?

Add it directly inside header.php. You can also accomplish this via Child Theme.

There are no magical solution for this built in this theme and you will have to write your own HTML to add image there.

It is not very difficult as basic code to display JPEG looks like this

<img src="https://colorlib.com/wp/wp-content/uploads/sites/2/best-vintage-wordpress-themes.jpg" alt="custom image alt text">

ok, thanks for the pointer. Will following be compatible with sparkling?

That plugin will change only Logo as it is hooked with Custom Header Image and we use that functionality to add logo on Sparkling theme.