Ricoh Aficio MP 3500P Operating Instructions Manual page 86

Adding Paper, Toner and Staples
C
Release the side lever to the "unlocked" position.
D
While pressing the release lever, adjust the side fences.
6
E
Adjust the back guide to the new paper size.
For 11" × 17" paper, put the back guide inside 1.
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HWY010E
HWY020E
HWY030E