How to edit an existing List
While your account comes with pre-defined Lists you may want to edit the List search criteria to better fit your needs.
Select List from List tab
On the List tab, select the list you'd like to edit and click More
Show search criteria
From the List detail page, select to Show Criteria.
Edit Criteria as needed
Once the criteria is displayed you can edit the current criteria to better reflect your needs. New fields can be added to help further refine the search by selecting the + at the bottom farthest to the right. Fields you no longer need can be deleted by selecting the x next to the field. You can choose to apply this new criteria or return to your previous results. Once you select Apply, the previous criteria is replaced with the new.