HP LaserJet 2300 Printer series - Manual (Page 35)

ENWW Loading trays 33
4 Place the paper in the tray and make sure that it is flat at all four
corners. Keep the paper below the height tabs on the paper-length
guide in the rear of the tray.
5 Push down on the paper to lock the metal paper-lift plate in place.
6 Slide the tray back into the printer.
Note
Whenever you remove a 250-sheet tray from the printer, always push
down on the paper to lock the metal paper-lift plate in place before you
replace the tray. The metal paper-lift plate releases and lifts the paper
up when you push the tray into the printer.
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