How do I install and set up Tray 2 on the HP Officejet Pro 8600?

Unpack the tray, remove packing materials, and place it on a sturdy, level surface, then turn off the printer and disconnect the power cord before setting the printer on top of the tray. Reconnect the power cord, turn on the printer, and then enable Tray 2 in the printer driver. Note that Tray 2 can hold up to 250 sheets of plain paper and should only be loaded with plain paper. (Page 30)