Enhance your .NET & Java apps by automating the document manipulation processes via standalone APIs. View, edit, convert, compare, watermark, edit, inspect, search and e-sign documents from Office, OpenOffice, CAD, 3D, images, HTML, PDF, and many other formats....com/2019/11/22/watermark-password-protected-documents-using...groupdocs.com/2019/11/22/watermark-password-protected-documents-using...