HP Deskjet 6840 Printer series - Option for two-sided printing cannot be selected

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Option for two-sided printing cannot be selected

The printer driver cannot sense the duplexer until a print job is sent to the printer.

Print a single sided document, and then print the two-sided document. The option

for using the duplexer will appear in the printer software.
If the option for the duplexer still does not appear, then verify that the following

conditions exist:

• The duplexer is attached to the printer.
• The duplexer is


in the printer software.

• The media type and size selected on the Paper/Quality tab are supported by

the duplexer.
For a list of supported media types and sizes, see the specifications for your


Automatic Two-Sided Printing Accessory

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