With the Natural Light feature, you can adjust the colour of the screen. Colours range from an orange candlelight for nighttime reading, to a white sunlight for daytime.
Note: Natural Light is only available for:
The Natural Light feature gradually changes the colour of the screen over the course of the day to make reading more comfortable.
During the day, the screen displays a small amount of blue light. As the day progresses, the light gradually changes to an orange candlelight, and contains less blue. Blue light helps keep you alert during the day, but can also keep you awake at night.
The Natural Light feature limits the amount of blue light exposure at night and can help you fall asleep more easily.
Limiting blue light from the eReader’s screen also makes it more comfortable for your eyes when you read in low light or in the dark
- Go to your Home screen.
- Tap the
Brightness icon near the top of the screen. The Natural Light settings menu will appear. - Beside Bedtime, tap the
dropdown arrow. - Select the time that you'd normally go to sleep.
- Adjust the screen's colour:
To let your eReader automatically adjust the screen colour, make sure the
circle icon beside Auto is towards the right
.
To manually adjust your Natural Light settings, make sure the circle icon beside Auto is towards the left 
.
Drag the circle icon towards the 
sun icon to make the screen glow white for daytime reading. Drag the circle icon towards the 
moon icon to make the screen glow orange for nighttime reading.
Note: When you manually adjust your Natural Light settings, your eReader will not automatically adjust the screen colour according to the time of day.