Canon LBP251dw User Manual page 310

<Preferences>
adjust the brightness
Contrast
Adjust the contrast (difference in brightness between light and dark areas) of the display to suit the installation
location of the machine.
Seven Levels
<Preferences>
adjust the contrast
Invert Screen Colors
Select <On> to invert the display colors. Select <On> if the display is hard to view even after the brightness was
adjusted in <Brightness>.
Off
On
<Preferences>
<Off> or <On>
Millimeter/Inch Entry Switch
Select the unit of measurement.
Millimeter
Inch
<Preferences>
Switch>
Message Display Time
Specify the interval in seconds at which two different messages are alternately displayed.
1 to 2 to 5 (sec.)
Setting Menu List
<Display Settings>
<Display Settings>
<Display Settings>
<Display Settings>
Select <Millimeter> or <Inch>
304
<Brightness> Use
<Contrast> Use
<Invert Screen Colors>
<Millimeter/Inch Entry
/ to
/ to
Select