HP Deskjet 5850 Color Inkjet Printer - Manual (Page 101)

the fence back until it locks into place
To print on legal-sized paper, set the paper width fence to
LTR.
4. Set the paper length guide by pulling it until the arrow lines up with the paper
size.
1. align the arrows
To print on legal-sized paper, pull the paper length guide all
the way out.
loading the lower tray
Follow these steps to load paper:
1. Verify that all three paper guides are set to the correct setting.
2. Insert the paper into the lower tray.
3. Insert the lower tray in the base until it locks into place.