Xerox Phaser 3121 Manual page 119

7.4
A
PPENDIX
6
The printer driver installation begins. When the installation
is completed, click Start.
7
The Linux Printer Configuration window opens. Click the
Add Printer icon on the toolbar at the top of the window.
Note: Depending on the printing system in use, the Administrator
Login window may appear. Type in "root" in the Login field and
enter the system password.
8
You see the printers currently added in your system. Select
the printer you will use. The function tabs available for the
selected printer appear at the top of the Add a Printer
window.