Best Answer Danny , 27 February 2013 - 11:30 AM
You're using the free version of PlatformPro and not the free version PageLines Framework which is called PageLines Lite. This is the reason why you see no such option as SuperSize background, which isn't available in Platform or Platform Pro, only PageLines Framework.
Although, you still should be able to upload a background image using Platforms options. You will most likely want to check your color options and layout or you can install the free version of PageLines via the Wordpress theme installer.Go to the full post