Dell 5310n Mono Laser Printer - Manual (Page 90)

2. Place the support unit on top of any previously installed drawers or the table or printer cabinet where you plan to use the printer.
The tab, round peg, and square holes on top of any drawer help you position the support unit so the edges are aligned properly. Make sure the support
unit is securely in place.
3. Attach another optional drawer, a duplex unit, or the printer.
You can attach a label to the trays to indicate the tray number.
4. In Windows XP, click Start® Control Panel® Printers and Other Hardware® Printers and Faxes.
In all others, click Start® Settings® Printers.
5. Right-click the printer icon and select Properties.
6. On the Installed Options tab, select 250-sheet tray or 550-sheet tray in the Available Options list.
7. Click Add.
8. Click OK, and then close the Printers folder.
If you install multiple paper trays, they will be automatically linked. For more information, see Linking Trays .
Installing a Duplex Unit
The duplex unit attaches under the printer, below the standard tray and above any drawers.
NOTE: You can install up to four optional paper trays, or three trays and a duplex unit.