Ricoh Aficio SP 3410DN Hardware Manual page 50

Paper and Other Media
C
Release the extender locks on both sides of the tray, and then pull out the
extender until it clicks.
After extension, make sure the extender's inner surface and the scale are
4
aligned.
D
Lock the extender in the extended position.
46
BXG211
BSP070S
BXG212