Dell 1100 Laser Mono Printer User Manual page 27

NOTICE: Never load envelopes with stamps, clasps, snaps, windows, coated linings, or
self-stick adhesives. These envelopes may severely damage the printer. The stamp is
shown in the illustration only for placement.
CAUTION: If you print 20 envelopes in succession, the surface of the top cover
may become hot. Please exercise caution.
Load a sheet of labels in the tray with the side to be printed on facing up.
NOTE: To prevent labels from sticking to each other, do not let the printed label sheets
stack up as they are printed out.
Load a transparency in the tray with the side to be printed on facing up, and the top with the
adhesive strip inserted first.