Go to Lists, find the appropriate list, and tap Edit.
To remove people, just uncheck them.
To add people, search by name or number, and select them.
How to Add People to a List Using Tags
- Go to the Contacts Section
- In the Filter section, search for the specific tags that are associated with the contacts
- Once done, click on the Global checkbox on the top left
- Then, on the top right, you can click on 'add to new list' if you would like to add contacts to a new list. Another option could be to add contacts to an existing list