Easily add, search, and remove watermarks in PDF, Word, Excel, PowerPoint, ODT, MSG, JPEG & more with the advanced GroupDocs .NET watermarking API....PDF, DOCX, PPTX, XLSX, MSG, VSD, JPEG, and more files on the...PPT, PPTX, POT, ODT, TXT, RTF, VSD, VSDX, JPEG, GIF, PNG, BMP, TIFF...