Dell 3100cn Color Laser Printer - Manual (Page 205)

To load envelopes that are under 8.66 inches (220 mm) in width, insert the envelopes with the flaps open and toward the front of the printer, with the
recommended print side face up.
To load envelopes that are over 8.66 inches (220 mm) in width, insert the envelopes with the flaps closed and the short-edge of the envelopes facing into the
printer, with the recommended print side face up.
You can load envelopes up to the maximum fill line in the tray at one time.
Using the Multipurpose Feeder
l Load only one size and type of print media during a single print job.
l To achieve the best possible print quality, use only high-quality print media that is designed for use in laser printers. For more guidelines on print media,
see "
Print Media Guidelines ."
l Do not add or remove print media when there is still print media in the multipurpose feeder or when the printer is printing from the multipurpose feeder.
This may result in a paper jam.
l Print media should be loaded with the recommended print side up and the top of the print media going into the multipurpose feeder first.
l Do not place objects on the multipurpose feeder. Also, avoid pressing down or applying excessive force on it.
l Do not remove any tray while a job is printing from the multipurpose feeder or Printing is displayed on the operator panel. This may result in a paper
jam.
The icons on the multipurpose feeder identify how to load the multipurpose feeder with paper, and how to turn an envelope for printing.
Linking Trays
Tray linking allows you to load the same size and type of print media in multiple sources. The printer automatically links the source/trays and will use the first
tray until it runs out, then switch to the linked tray.
If you load the same size print media in each tray, make sure the print media is the same type in order to link the trays.
When the selected trays are loaded with the same size and type of print media, select the Paper Size and Paper Type settings in the Tray Settings for each
source.
NOTE: Make sure set the envelope flaps are completely unfolded.
NOTICE: Never use envelopes with windows, coated linings, or self-stick adhesives. These lead to paper jams and damage to the printer.