Janice

I'm relatively new to MailChimp (working on second campaign), and there are a few things I can't quite figure out. 1) I would like to use a background color in each content box, but all I can seem to do is highlight put background behind the text. 2) I would like to put a line between each topic. How do I do that? 3) I have a black box between my last topic (content box), and the MailChimp footer that I can't seem to get rid of. Thank you, Janice