From your store's Dashboard click the Site Designer icon in the left Navigation Menu.
Your store offers a default Footer Block as well as several different footer options. These optional footers can be accessed by adding them to your store's Homepage. Make sure the dropdown menu at the top of the Site Designer page is set to Page: Home. This will ensure that your new footer applies to all of the pages on your store.
On the Home Page, mouse over the page until you see the Plus Sign icon to add a new block. Click the Plus Sign icon and locate the Footer section of the Add A Block menu. Open the section and choose Horizontal Links Footer, using the Add Block button.
Once your block has been added, hover over the new footer section and locate the gray Edit button. Use the Edit button to open the Edit Block menu and customize it.
The Edit Block menu for the Horizontal Links Footer Block offers these options:
Header Block Controls
Trash Can Icon to Delete Block
Arrows to move block up or down the page
Make This Block Reusable Toggle
Background Color Chooser
Text Color Chooser
Icon Color Dropdown Menu (Default, Grayscale Dark or Grayscale Light)
Enable Apple Pay Toggle
Enable PayPal Toggle
Enable Visa Toggle
Enable Discover Toggle
Enable Mastercard Toggle
Enable American Express Toggle
Make sure to click the Done button at the bottom of the block edit section to save your changes.
Additionally, you will need to click the green Publish button at the top of the page to make your changes live on your store.
You will likely want to remove the default footer at this point. To do so, locate the default footer, easily distinguished by its green Edit Template button, visible when you mouse over it. On the right side of the default footer, you can click the Trash Can icon to delete the default footer.
As a final step, again click the green Publish button located at the top of the page to make your changes visible on your customer-facing site.