In the steps for a simple review process, comments are mentioned, but I do not see a place to view any comments entered once the document exits the process, and searching for comment content does not appear to work.

From preview you can complete a review by:

  1. Select View from the ellipse menu
  2. Either click edit to allow updating of the metadata or enter optional comment and then click Complete Review
  3. Enter any metadata fields and comments (optional) and click Complete Review