This is for users who want to learn about Additional Document Security Features.
Adding Additional Document Security Features to your project enables two things: Sealed Documents and digitally signed closing books.
See How do I create a new project? to learn how to enable Additional Document Security Features in you project.
See What are Sealed Documents? to learn more about Sealed Documents.
See What is the difference between each type of closing book? to learn more about digitally signed closing books.