Oki ES 1624n MFP - Manual (Page 19)

Loading Paper • 19
2. Fan the paper to be loaded at the edges (1) and in the middle (2),
then tap the edges of the stack on a flat surface to make it flush
again (3).
3. Load paper print side down, making sure the rear stopper (1) and
paper guides (2) are snug against the paper.
1 2 3