Footer settings can be found under (design > theme editor):
Choose 'footer'

Footer background
Select the colour for the background of the footer here.

Footer font colour
Select the font colour for the footer here.

Advanced footer settings
Activate the advanced footer settings here.
When you activate this setting, you can add a new menu via "Navigation" and if you name the menus footer-1, footer-2 and footer-3, you can enter the different links for the different footer columns here.

Footer title 1
Enter the title for footer-1 here.

Footer title 2
Enter the title for footer-2 here.

Footer title 3
Enter the title for footer-3 here.