XPS Annotator a tool with all the capabilities you require to quickly and easily add notes or comments to XPS documents.
    This tool is an exclusive XPS Viewer, annotator, documents properties adder and digital signature creator. The tool supports exclusive features like: easy interface that allows adding notes or comments to XPS documents, flag any information, highlight important notes, adding text notes, ink notes, highlighting annotations; allows adding document properties to any XPS document to make its management easier, its built-in sidebar makes it easier to read the contents of all pages and jumping from one page to another by clicking the thumbnails, and provides document security with its digital signatures. The tool also supports tasks like save-a-copy, print-output, copy-to-clipboard, zoom, and text-search.
    This powerful document annotator is compatible with Microsoft .NET Framework 3.0 and is already installed on Windows Vista.