Once a collaborator has accepted the invitation link you can assign them permissions to view an individual learner or a group of learners.
Enter a collaboration name and add a collaborator by selecting the 'Add' button.
By checking the box you are agreeing to give the collaborators view only permission over the learners you select.
By selecting the 'Add' you will be able to select learners or groups of learners for the collaborator to collaborate on.
From here you can now see the collaboration, collaborator(s) and learners they have visibility over.
To finalise the set up select 'Create'.