Xerox 421 manual Description Function

Item	Description	Function
6	LCD Display	Displays the status of the machine, operation process,
		various instructions and messages.
7	Features	This key gives access to the screens which enable you to
		program features.
8	Machine Status	Select to change or view the various default settings of the
		machine and paper trays. Printer defaults are also accessible
		via Machine Status. To exit Machine Status press Features.
9	Numeric Keys	Use these keys to enter numeric values when programming
	(0 to 9, *, #)	features and settings.
10	Energy Saver	Press to enter the Sleep Mode. Once selected, the light next
		to the key is illuminated. To exit Sleep Mode press the key
		again.
11	Interrupt	Press to suspend the current job so that another job can be
		performed. During the job interruption, the light next to the
		key is illuminated. When the key is pressed again, the
		interrupted job proceeds. If this key is pressed again during a
		print job, the print job will pause to allow a copy job to be run.
12	Clear All	Press once to clear the number of copies entered.
		Press twice to clear all features selected in the Copy function.

2-12 WorkCentre Pro 421 User Guide