HP 16V - Manual (Page 79)

Handling Paper
Setting Up the Rear Stacker
This printer has a rear stacker that allows you to eject sheets straight
out the back to minimize curl. Use the rear stacker to print
envelopes, overhead transparencies, and labels. For the rear stacker of
an optional duplex unit, refer to its manual.
To use the rear stacker, follow these steps:
1. Open the rear stacker. Pull
the projections at the top of
the stacker.
2. Remove the paper support
from inside the stacker.
3. Set the paper support in
position. Insert the two
ends of the paper support
into the mounting grooves
of the rear stacker.
2-32 User’s Manual