Dell B1160w Wireless Mono Laser Printer - Manual (Page 30)

Media and tray
30 2. Learning the Basic Usage
5
Setting the paper size and type
After loading paper in the paper tray, set the paper size and type.
Open the Printing Preferences (see "Opening printing preferences" on page
32) and set the paper size and type in the Paper tab.
If you want to use special-sized paper such as billing paper, select Custom
in the Paper tab in the Printing Preferences (see "Opening printing
preferences" on page 32).