Dell 3110cn Color Laser Printer User Guide - Page 385

-D Enables the long-edge binding feature. When it is specified, the printing direction or position will be adjusted and both sides of the paper printed so that the longer edge of the pages can be bound. This option is available only when the optional duplexer is installed on the printer. -Itray-input Specifies the paper tray. A paper tray can be selected by directly specifying a tray or by specifying a paper size. When a paper size is specified, the tray loaded with paper of the specified size will be found and selected automatically. The parameters for selecting a paper tray are as follows. 1 Feed paper from tray 1 (Standard 250-sheet tray). 2 Feed paper from tray 2 (Optional 550-sheet feeder). A4 Feed paper from the tray loaded with A4 (210 x 297 mm). A5 Feed paper from the tray loaded with A5 (148 x 210 mm). B5 Feed paper from the tray loaded with B5 (182 x 257 mm). LT Feed paper from the tray loaded with Letter (8.5 x 11 inches).