Pre-requisites:
Access to the file, having a review saved as a draft, which you need to edit.
You need to have the 'Can Create Review' role privilege on the project where a review needs to be created.
Below are the steps to edit an existing draft review on a file:
Follow the steps to open the required file in the viewer (on which a review is saved as a draft). Existing reviews appear on the right side.
Navigate to the draft review record that you need to edit and click the
icon corresponding to the same.
The screen to edit the selected review will appear.
Enter the recipients in the 'To' field.
Edit the review draft as necessary, including the 'Review Disciplines', 'Suggested Status', 'Title' and 'Mark as Private' fields.
To modify or delete a saved comment created on the review, mouse over and click the
icon or the 
icon corresponding to the comment, as applicable.Once you have updated all the review details, click the Submit option.
Next Article: Discard an existing Draft Review When Viewing a File