Add Contact(s) to a Contact Group
To add Contact(s) to a Contact Group, user role must have an “add“ privilege enabled; you can manage Contact Groups if you have the respective permissions checked in at least one project.

Navigate to the Contact Groups Detail View of the Group to which new Contact(s) will be added.
Click “Add” Button in the “Contacts/Users” Table

Select the checkboxes of the Users that are to be added to the contact group and close the modal.
For the purpose of Audit Logs it is tracked when Users are added/removed from a Contact Group