Unable to print envelope from rear slot
Epson WF-3640 Printer connected to desktop with Windows 10. Using MS Word 2016.
I'm unable to get the printer to print to an envelope inserted in the rear paper feed slot. I've set the printer property "Paper Type" for Envelope, "Paper Source" for rear paper feed slot. And mixed these up. Always similar results. The envelope in the rear slot will be fed through without printing and then a sheet of paper from the cassette is printed on. Or get an error on the printer that the Paper Type doesn't match the paper in Cassette 1.
What is the secret sauce to print an envelope?