When I go to "Pages & Themes" and choose "Customize" I'm presented with a number of great looking options such as font and background color. I've been using Concrete5 for almost a year but I've never seen "customize" work. I once put a teeny bit of code in the CSS option there and though it never took, I cannot delete it either. I delete, save and it's still there. Does anyone else have this problem or know what might be wrong? Or know how to fix it? I do not speak HTML, CSS or PHP - just English unfortunately. But, I'd love to be able to make these basic changes to my site.