Short description of Star Envelope Printer Pro 5.10: This application makes printing your Envelopes just so easy. Give your envelopes that professional result. It saves all your different mailing and return addresses so you do not have to re-key these every time which makes your life so much easier. Just click on the Address button, click on a stored name, click print and you are done. It really is as easy as that. Handles all different types of envelopes and printers.