Three security policies can be applied to project documents.
Personal
A Personal document can be viewed, modified, or deleted only by the user
who added it to the project.
Shared
A Shared document can be viewed, modified, or deleted by
any project team member.
Read-Only
A Read-Only document can be viewed by any project
team member, but team members cannot modify it, delete it, or perform
certain actions such as relating items or starting a
review.