Print on both sides (DUPLEX)

Specifies whether output is printed on one side or two sides of the paper.

The possible values are:

*NO
The output is printed on one side of the paper.

*YES
The output is printed on both sides of the paper, with the top of each printed page at the same end of the sheet of paper. This is usually done for output that is bound at the side.

*TUMBLE
The output is printed on both sides of the paper, with the top of one printed page at the opposite end from the top of the other printed page. This is usually done for output that is bound at the top.

*CMDDFT
The system default is used.