How do I edit the header at the top of the page?

Hi Todd, That depends entirely on which theme you're currently using for your site. Most modern themes inlude a panel in the Customizer through which you can upload and choose a header. Other themes include their own proprietary Settings panel with options to customize the header. This lesson from our WordPress 101 course demontrates how to change the header in the current default theme, Twenty Seventeen: https://wp101.com/tutorial/customizing-the-theme/ Hope this helps!