Once a reviewer completes and locks a review, they cannot make any additional changes to that review. However, chairs, assistants and track chairs can re-open the review so further edits can be made. The reviewer will not receive a notification when this is done so you will have to confirm with them when they can log back in to edit the review once more.
Step 1: Locate the submission
In the Reviews hub navigate to the List of Submissions. Search for the submission in the list and when it appears, click on the title of the submission to view its reviews.
Step 2: Find the review
Once the submission is expanded, scroll down to find the specific review that you need to reopen and select Re-open Reviewer on the right-hand side.
You should see the padlock icon beside the reviewer's name disappear and be replaced with the Continue Review button. This indicates that the review has been re-opened and the reviewer will be now able to log in and make additional changes.
That's it! You can contact the reviewer to let them know they can now make changes to their review.