When I try to print from my iPad to my new MX920 I get the message that there's no paper in the upper tray. Admittedly it's a screen shot which goes to iPhoto even though I'm usually sending a page of text. There must be some way of telling the printer that it's a page of A4 that I want to print on plain paper - from the lower tray. How do I do this please? Thank you!
