The main functions of the Reviewer Details are:

1. Edit Display Name, which lets you edit a person's name displayed on the proof
2. Edit Role, which lets you edit a person's role on the proof
3. Edit Email Notifications, which lets you edit a person's email notifications on the proof
4. Edit Deadline
5. Edit Decision, which lets you edit a person's decision on the proof (your name will be noted as the editor)