HP LaserJet 9050 Printer series - Manual (Page 47)

ENWW Loading input trays 45
Loading custom-size paper in Trays 2, 3, and 4
Use the following procedure to load custom-size paper in the tray.
CAUTION To avoid a jam, never add or remove paper from a tray while printing from that tray.
1 Open the tray until it stops.
2 Press the tab on the front (X) paper guide and slide the guide all the way out.
3 Press the tab on the left (Y) paper guide and slide the guide all the way out.
4 Load (orient) the paper according to size.
Note See Orienting media for instructions on loading preprinted, letterhead, and prepunched paper.
5 Set the Custom/Standard switch to Custom.