Sets the change level of documents privilege. Just as the Adobe Professionals Changes Allowed settings. 0 None. 1 Inserting Deleting and Rotating Pages. 2 Filling in form fields and signing existing signature fields. 3 Commenting filling in form fields and signing existing signature fields. 4 Any except extracting Pages....Inserting, Deleting and Rotating pages. 2: Filling in form fields...fields. 4: Any except extracting pages. public int ChangeAllowLevel...