Epson ActionNote - Manual (Page 55)

Adjusting the LCD Screen
The screen
on
your ActionNote is a backlit monochrome LCD.
You can adjust the brightness and contrast with the two
switches next to the screen. Adjust these switches to produce
the best display for your viewing angle.
Slide the brightness switch down to increase the background
brightness, or up to darken it. Slide the contrast switch down to
lighten
the contrast
between the background and foreground,
or up to darken it.
3-12 Using Your Computer