HP Officejet J5740 All-in-One Printer - Manual (Page 170)

6. Replace the output tray.
7. Flip the tray extender up toward you.
NOTE: When you use legal-size paper, leave the tray extender closed.
My document did not print
Cause: The input tray is empty or there is a paper jam.
Solution: Make sure paper is loaded in the input tray and that there is no paper
jam.
To load full-size paper
1. Remove the output tray.
Chapter 11
168 Troubleshooting