# Participate in a browser-based review offline

| After you open the PDF document that’s being reviewed, click Save and Work Offline on the Commenting toolbar.
| Use the Note tool and other commenting tools to add comments.
| When you are finished reviewing the document, click Go Back Online on the Commenting toolbar. The online version of the PDF document opens in the web browser. Your comments appear in the document, but they have not been sent.
| Click Send And Receive Comments on the Commenting toolbar to upload your comments to the online document and view other reviewers’ comments.

Comment and Markup