You may be asked to add a reviewer to an older version of a proof if they weren’t included on the proof at the time.

As the proof owner, you can either:

- Add them as a
*reviewer*into the workflow in the proof’s info pane.

Note: Because the proof has a new version they won’t receive an invitation to review the proof since the red pen is no longer available. - Add them as an
*owner*(they will have the same priviledges as you do)

To add an owner, follow the steps in this help article.