Ricoh Aficio 650 Operating Instructions Manual page 201

When the whole tray is pulled out:
Important
Push the right paper to the right side, and the left paper to the left side.
When the left half of the tray is pulled out:
Important
Do not stack paper over the limit mark.
Make sure that the paper stack is flush with the left side fence.
Note
Shuffle the paper before placing it in the tray.
Correct the paper, if curled or warped, before placing it in the tray.
C
Push the paper tray in until it stops.
TSPH090E
TSPH100E
B Loading Paper
3
167