If you want to add entries to the context menu of Windows Explorer, here is the solution. You can use Quick PDF Tools available free, which has the facility to adjust the PDF metadata. The added entries allow its users to modify the PDF documents in a moment. Moreover, you can use them to edit certain PDF metadata entries in a window right on the Windows Desktop and it is simply possible to edit even the title, author, keywords and subject metadata entries.
Want to read PDF files in GMail without PDF reader ?
My Blog 