10-20-2019 11:56 PM - edited 10-20-2019 11:56 PM
Be sure to select Short Edge Binding on the two-sided setting, then it won't print upside down for landscape printing.
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10-21-2019 08:50 PM
In my iPad AirPrint options screen it only has toggle to turn on or off double sided printing and color vs black and white. No other options. I have tried to use HP smart and printer pro but with same results can turn on Double-sided printing but no further options for long or short side.