Ricoh SP 3400N Operating Instructions Manual page 49

Loading Paper
BXG106
When loading custom size paper, position the paper guide slightly wider
than the actual paper size.
D
4
Load the new paper stack print side down.
Make sure paper is not stacked higher than the upper limit marked inside the
tray.
BXG036
Slide the guides inward, until they are flush against the paper's sides.
Make sure the paper is not stacked higher than the projection on the side paper
guides.
BSP065S
43