This may be a ridiculous question. But is there a simple way to set all of the content boxes (header, nav bar, content area, etc) to optionally have NO background color? Or perhaps set some kind of transparency on them? I'm just working with the default.css for this theme, which is just the sort of framework I need for my current project. But I have a big background image here that can't be seen with all the solid colored content boxes on top. Thanks in advance for any ideas or input.