Reply to an annotation
Multiple reviewers can discuss something by responding to an annotation.
Any user can reply to an annotation or to another reply. Reviewers can use multiple replies to discuss the content.
However, only the user who added a reply can edit it or delete it, and all replies to an annotation are locked except for the most recent reply.
To reply to an annotation:
Your annotation appears in the Annotations side panel as a reply to previous comments that others have made.