Ricoh Aficio SP C232DN Operating Instructions Manual page 75

Paper and Other Media
F
Pinch the front end paper guide and slide it inward to match the legal paper size.
5
G
Load the new paper stack print side up.
Make sure paper is not stacked higher than the upper limit (upper line)
marked inside the tray.
Slide the guides inward until they are flush against the paper's sides.
54
ASH145S
ASH126S
ASH146S