There is no one-click "merge lists" button. The approach depends on whether your lists are dynamic (saved filters) or static (fixed membership).
Combining dynamic lists using "Add records"
Dynamic lists are built from saved filters. To include contacts from a second list in a dynamic list:
Open the list you want to add people to.
Apply any filter to the current view. (The "Add records" button is disabled when no filters are active, because you are already viewing all records.)
Click the filter menu button and choose Add records.
A new filter group is added with an OR combinator. Set its conditions to match the contacts from your second list. For example, use the On Saved List (Name) filter field under the "Saved Lists" group to select the other list by name.
Save the list. The saved filter now returns everyone who matches either group.
The "Add records" option adds an or combinator block to the query builder. Contacts who match either the original filter or the new block appear in the results.
Adding contacts to a static list
Static lists hold a fixed set of contacts. You can add individual contacts to a static list from a contact's profile or by right-clicking a contact row in any table and choosing Add to list.
There is no bulk "copy all members from list A into list B" action in the UI. If you need to combine two static lists, the most practical approach is to create a new dynamic list with an OR group that references both lists by name using the On Saved List (Name) filter field. This gives you a live view of everyone on either list without needing to copy membership.
Which approach to use
| Situation | Approach | |---|---| | Both lists are dynamic and you want a live union | Use "Add records" with an OR group | | You want a live union that includes members of two static lists | Create a dynamic list with two OR groups, each using the "On Saved List (Name)" filter | | You want to add individual contacts to a static list | Use the contact's right-click menu or profile page |