Header Images
Then scroll down to HEADER IMAGE and replace the text with an uploaded image or upload a new image. The default header image for sub pages is 1,200 pixels wide by 460 pixels in height. The home page header image is 1,400 pixels wide by 790 pixels in height..
Add Header Image to Any Page
A header image is available to any page that includes the section HEADER IMAGE in the page editor. Just go to the desired page editor and follow the same steps listed above.