Use text and shape annotations in Smart Review to add comments and specify required changes to a file.
You can use the following types of annotations:

Note: When you annotate a file that has multiple revisions, the annotations apply to the current revision only. If you display a different revision in Smart Review, annotations that you added to other revisions do not appear.

The annotation tools are available only when you have a job role that includes the Annotate user right and when the page status is Approval Requested or Approval in Progress.