HP Deskjet 3000 Printer - J310a - Manual (Page 23)

Load envelopes
a. Raise the input tray
❑ Raise the input tray.
b. Lower the output tray
❑ Lower the output tray and pull out the tray extender.
c. Slide paper-width guide to the left.
❑ Slide paper-width guide to the left.
Load media 21
Paper basics