You can sign PDF documents in Windows, completely electronically, using the PDF viewing program Adobe Reader. Here's how.

To password protect a PDF in Adobe Acrobat Reader, you'll need the paid Pro version, which starts at $14.99 a month.

Adobe's AI Assistant in Acrobat and Reader can answer questions about a PDF and even help you generate content based on the information in the file. Lance is an experienced writer who tries to unravel ...