Atlantic comes with an additional footer format with an alternate set of features.
Activate the alternate footer
Enable by checking Use alternate footer layout. To get here, navigate to the Footer section in the theme editor:
Customize > Sections > Footer > Alternate footer
What is the difference?
The default footer layout places your social icons and footer message within the footer blocks with the footer menu outside, whereas the alternate layout places your footer menu inside and the social icons out.
Atlantic also gives you the option of displaying a Secondary footer menu (the primary one can be edited in Online store > Navigation). Simply select the menu you want to use from the dropdown menu. Note that the secondary menu will only display if you have enabled the Alternate footer layout.