Thanks, but this doesn't work; the automatic duplexing option is not available in "printer shortcuts." It was there when I had Windows 8, but not since changing to 8.1 a couple of weeks ago. I'm receiving automatic updates from HP for this unit, and they say I'm up to date. But I believe I need a new driver to relay the 2-sided instructions.
Also, there is no more HP Director; it's now just HP Solutions.