Go to Blogger.com, log in to your account and click the "Design" link next to the site you want to edit. Click the "Add a Gadget" link in one of the available layout sections. A pop-up window appears.

To add a header image directly into the Blogger.com blog, you provide a link to the image directly in the coding. The header image must be hosted on an image site. Since Blogger.com is owned by Google ...