Share 'How do you change the appearance of your webpage?'

hey, sorry this is more of a technical question. i noticed some people have cool customized pages where they use their own artwork and stuff for the background. how do you do that? i saw the place where you can select a "theme" but i couldn't figure out how to totally customize it. also why does there seem to be two different We Make Zines pages? when i click on my name at the top, it leads me t…