Board Thread:Support Requests - Getting Technical/@comment-25150485-20140709184610/@comment-2170536-20140709185148

For the wiki navigation, click on 'contribute' and then 'edit wiki navigation'. When you have finished your changes, click on 'preview' to verify it looks the way you want, and then publish your new menus.

For the background, you can use the Theme Designer to play around with backgrounds and colors.