HP 16V - Manual (Page 93)

Adding Paper Sources
Rear guide:
Mount the guides in reverse
order of the removal.
5. Adhere the correct paper
size label.
6. Load paper and check that
the paper fits the tray.
7. Return the paper tray.
Slide the tray back into the
printer.
Notice:
Select the correct paper size on the print menu of your application
program, or a paper mismatch error occurs.
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User’s Manual