Header image credit: adapted from cgreb.
Header Image
If you want to use the image shown in the image above, download this header image. Save the image in your computer. Then, go to the Layout: Page Elements section. Upload the image into the Page Element titled Picture. As per license requirement, give credit to the header image provider as mentioned in the credit section above. Note: Do NOT upload the image into the Header Page Element.
If you want to use your own image for the header, the image has to be 800 pixels wide (with any height) to fit the header nicely.