How to back up emails into printable PFD

Thank you for all you do for us. Your product, service, and usefulness have no equal. It is why I donate monthly. You guys are awesome. How I can back up all my emails into a printable PDF? - I have 1 folder of email I like to preserve - I want to back them all up into a PDF - Example: Folder has 100 emails from Jan 1 - Jan 31 - Back it up into local PDF file - Open PDF to read the entire set - Print it etc (basically same as converting your word into PDF, but this is for email chains) Thanks