Hey... I'm very new at this and just starting to feel my way around WP ... I have a question, don't laugh. How can I change the picture on my main page header? My site is JacobFannin.com .... and right now it is just the blue design with the name. How easy is it to change that to a custom picture, and... is it possible to change the "header picture" of all the different pages, or will it have to be the same throughout. Thank you in advance!