Approving a submittal
The submittals feature requires that submittals have been activated first in your organizational settings, which in turn allows you to activate it in your project settings.
1. Click on Submittals in the navigation menu on the left.
2. Click on a submittal where you are the assigned approver.
3. All vital information is available in the Submittal. 
4. Here you can approve or reject the submittal and leave a comment. You can also delegate the role of approver to someone else.
5. After making your decision the submittal is closed, and the document is marked as either approved or rejected.