IBM S544-5343-03 - Manual (Page 58)

b. Adjust the end guide to the correct paper size and push down on the end to
lock it into place.
5. Insert the paper along the left side of the tray. Make sure you place the corner of
the paper under the retaining clip at the front of the tray and under the plastic tabs
on the end guide. Do not load paper above the maximum line.
38 Network Printer 17: User’s Guide