To Add a Collaborator to this project, click Add Collaborator on the right of the project.
Next, type in their first and last name if they already have a Frame.io account.
Or, you can type their email address to invite them as a collaborator.
The collaborator will receive an email notification to Join the project. Until they confirm, you will see them on the Project as a Pending Collaborator.
To turn off the ability for Collaborators to add other Collaborators, go to the Project Settings and you can toggle that option off here.