HP 220240 - Manual (Page 51)

8. Insert a single sheet of paper, labels, or a transparency into the printer
until it stops.
— The paper is automatically fed into the printer.
— The printed paper is sent to the rear output tray.
CAUTION:
Remove transparencies from the rear output tray as each one
is printed. This prevents them from sticking together.
MLO-005133 (Figure 2-23; 15.5 picas)
2–24 Operator’s Guide