There are several ways to create a contact list and one of them is through Contacts > Database Management > Contacts Lists. The following steps will show how to edit a saved contact list.
1. Navigate to Contacts > Database Management > Contacts Lists 2. Hover over the List Name > Click Manage 3. Click the Add Contacts by Query button on the top 4. On the pop-up window, add or remove new query 5. Click Save Query and click Run Query