HP LaserJet 8000 Multifunction Printer series - Manual (Page 91)

Chapter 2 Printing Tasks 91
Selecting the Output Bin
Adjusting the Paper Stop
The paper stop, illustrated below, is located near the Standard Output Bin. It
can be adjusted to help paper lay flat as it exits the printer. The paper stop
does not have to be raised for Letter or A4 size paper. Note that the printer
jams if the paper stop is set to a smaller size of paper than is being printed.
1. Pull the left side of the paper stop up until the stop is in an upright position.
2. Slide the paper stop to the mark indicating the largest paper size to be printed.