Footer Tab, you can set contact information (address, telephone number, email) also map and social network. You can change any content on your website footer. There are check boxes that let you easier show or hide any field of the information. Website footer contains the information listed at the bottom of the page. If you are editing in the Design tab menu, it will only display an example of footer navigation, so it is not the actual footer navigation of your site.
You can set your Copyright by go to Design Page -> Footer -> Copyright