Hi,

There is no permissions that controls whether you can save a file or not --- technically if you can open the file, you already have the entire file data on your computer, so nothing can prevent you from saving another copy of it into a different file.

Additionally, permission settings are just what the file "wants" --- in another word, it's like the PDF file author's "wish". A "comforming" PDF Reader supposes to "honor" this wish. However PDF file is open standard, so in theory anyone can write a reader NOT to honor these wishes.

Lastly, only the values listed in the PdfDocumentPermissions enum type are defined:

https://www.essentialobjects.com/doc/eo.pdf.pdfdocumentpermissions.html

For example, you can use PdfDocumentPermissions.Print to control whether printing should be allowed (again it's up to the PDF Reader to honor this or not). Since there is no PdfDocumentPermissions.Save option, there is nothing to tell a PDF Reader whether save is allowed or not.

Thanks!