Lexmark E450DN - E 450dn B/W Laser Printer Service Manual page 29

Operator panel (Continued)
Button
Navigation buttons
Display panel
Function
The Up or Down buttons are used to move up and down lists.
When navigating through a list using the Up or Down button, the cursor
moves one line at a time. Pressing the Down button at the bottom of the
screen changes the screen to the next whole page.
The Left or Right buttons are used to move within a screen such as
moving from one menu index item to another. They are also used to
scroll through text that will not fit on the screen.
The Select button is used to initiate action on a selection. Press Select
when the cursor appears next to the selection you want such as
following a link, submitting a configuration item, or when you want to
start or cancel a job.
The display panel shows messages and graphics describing the current state of
the printer and indicating possible printer problems you must resolve.
The top line of the display is the header line. If applicable, it will contain the
graphic indicating the Back button can be used. It will also display the current
status, and the Supplies (Warnings) status. If multiple warnings are present,
each warning will be separated by a comma.
The other three lines of the display are the body of the screen. This is where you
view printer status, supplies messages, show-me screens, and make selections.
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Diagnostics information