To apply an attribute to a List first create your List then go back to the List dashboard. Click the gear icon next to the List you would like to apply an attribute to and click "Actions" in the drop-down menu.
Click on the "Apply Attribute" button in the Actions Modal.
Select the attribute you'd like to apply from the dropdown list. Then, add the value for that attribute that you'd like applied to the entire List. If your attribute doesn't already exist you will first have to create your attribute in Settings.