What is a private document?
A private document may only be accessed by Member+ and above. This allows you to restrict documents to certain members. (See also: What is a private folder?)
Can a profile photo be private?
No, it is a requirement for a profile photo to be shared with the team.
How do I make a document private?
When uploading the document (See: How do I upload a document?) select the option to restrict the document's privacy to Private. This will apply the restrictions to the document.
Can a member see private documents about themselves?
Yes. A member is able to see all document in their own folder. Private documents will be hidden from other Members, and only visible to Member+ and above and the member themselves.
If you wish to restrict documents from a Member, create a private folder (See: What is a private folder?)