Ricoh Aficio SP 3400SF User Manual page 82

Getting Started
F
Pinch the end paper guide and slide it inward to match the Legal paper size.
2
G
Load the new paper stack print side down.
Make sure paper is not stacked higher than the upper limit marked inside the
tray.
Slide the guides inward until they are flush against the paper's sides.
72
BSP072S
BSP063S
BSP064S