You can
increase print density to darken your prints on plain paper. This
is especially useful when you print with the built-in basic driver,
which does not include density adjustment settings.
Note:
Increasing density may reduce print speed.
From the home screen, select Menu and press the OK button. You
see this screen:
Press the arrow buttons to select Plain Paper Density Setting and press the
OK
button. You see this screen:
Press the arrow buttons to select +1 or +2
and press the OK button.