If you initiated a review, you can invite
more reviewers. If you are a reviewer, ask the initiator to add
reviewers so the initiator can track all reviewers and receive notification
when comments are received.
Click Review & Comment , and
choose Review Tracker.
Select the desired PDF under Reviews I’ve Sent, and click
Add Reviewers on the right.
Follow the on-screen instructions to add email addresses,
change the message as needed, and send the invitation.