I posted these questions in the Apple Zen support area and elsewhere, but no one seems to be responding...can someone please look on www.photographysisters.com

I would like to get rid of all the white background and make it black!

Also, I turned off the right side navigation box, but there is still a greyish box there! Please help!

Thank you...sorry if I'm being a pest, but we have tried a lot on our own and don't want to mess everything up!