You have saved several e-mail lists from previous searches or other sources, which you would now like to merge? This is just as possible as a comparison with a blacklist, for example from newsletter unsubscriptions.
To combine several e-mail address lists, you can of course simply search through them using the search function and then delete the duplicates. However, the route described above is significantly faster, especially with large address databases.
! The menu items for adding or removing address lists can be accessed via the "synchronization" Button under the e-mail list as well as in the menu under file ❯ Matching: ... to be found in the email grabber.