Use the online viewer to mark up and save changes to documents you're reviewing.
Add your review status and comments/markups to the document.
When ready, click the Submit Review button. The document will be sent to the next reviewer in the workflow via transmittal.
If you do not submit your review after saving then your comments and markups are only a draft. If the initiator skips your step or terminates the workflow before you submit your review, then all your comments and markups will be lost.
Submitting documents one by one allows the next reviewer to start working on them immediately, but creates a separate Workflow Transmittal. If you wish to reduce the number of transmittals you should submit documents in larger batches.