This feature is only available to Owners, GoProof Admins and Gatekeepers.
Step 1.
Access the proof via the link from your invitation email.
Step 2.
Click Collaborators in the side menu.
Step 3.
Click the Share button.
Step 4.
Enter the details for the new collaborator of select an existing user from the list when clicking in the email field. Once completed click share and an email notification will be sent to the collaborator with a link to view the proof.