C9600 User’s Guide> 26FACE-DOWN STACKERThe face-down stacker on the top of the printer can hold up to 500sheets of 20 lb (80 g/m²) standard paper, and can handle paperstocks from 17 – 57 lb (64 – 216 g/m²). Pages printed in readingorder (page 1 first) will be sorted in reading order (last page on top,facing down).FACE-UP STACKERThe face-up stacker should be opened and the tray extension pulledout when required for use. (With the face-up stacker either open orclosed, the driver setting of Face Down will successfully direct printsto the Face-Down stacker.)The face-up stacker can hold up to 250 sheets of 20 lb (80 g/m²)standard paper and can handle stocks up to 71.3 lb (268 g/m²).Always use this stacker and the multi-purpose feeder for paperstocks heavier than 57 lb (216 g/m²).DUPLEX UNIT ( IF INSTALLED)This option provides automatic two-sided printing on plain paper fedfrom Trays 1 – 5 or the MP Tray. Applicable paper sizes are A6, A5,B5, B5LEF, Executive, A4, A4LEF, Letter, LetterLEF, Legal 13 in,Legal 13.5 in, Legal 14 in, B4, Tabloid, Tabloid Extra, A3, A3 Wide,A3 Nobi, Custom size (3.9 – 12.9 in wide, 5.8 –18 in long), usingpaper stocks in the range 20 – 32 lb (75 – 120 g/m²).