Footer - Builder
Same these Template Builder above, you can follow screenshot below for create, edit and configuration
Create Footer Layout Template

Edit Footer Layout Template

Display in Frontend
Select a layout for footer from Theme Option, this option will be apply for all page and post of site

Change the layout in Page Options, let go to any page you want to change the Footer layout. Edit that page and then scroll to the bottom. You will see the option for Footer layout in Page Options

Notice: The options are "empty" or default to "inherit", which will receive the default configuration in Theme options. The options in Page Options apply only to the page you configure.