Double sided printing with a Macbook Air and HP printer
I have been using the same MacBook Air and HP Officejet Pro 8620 printer for several years. When I go to print, I can select "double sided", it never prints double sided.
I went into System Preferences and selected Printers and Scanners, then selected Options and Supplies. I don't see the option to only select Option. All I see is General (with nothing telling me about double sided printing) or Supply which just tells me the ink levels.
What am I missing? How do I get it to print double sided again?
MacBook Air 13″, macOS 10.15