You can use the screen brightness keys to adjust screen brightness on a Chromebook.
Change Screen Brightness from Taskbar
To change screen brightness:
- Click the time or battery icon on the bottom-right corner to open the notification area.
- You will now see the screen brightness slider.
- Click and drag it to the left to lower the brightness
- Click and drag it to the right to increase the brightness.
Adjust Brightness Troubleshooting
If you have issues adjusting your Chromebook’s screen brightness, log out and log in using the Guest account. Now, try the brightness settings. If it works, reset your Chromebook and try again.
If a reset did not fix the display brightness, you might want to contact your Chromebook’s manufacturer for further troubleshooting.
Adjusting Keyboard Backlit Brightness
Here is a related tip. If you are looking for the keyboard shortcut to adjust the brightness of your Chromebook’s keyboard backlit, (if your Chromebook does have that feature) use the same brightness keys while holding down the ALT key.
Hope you find this useful. If you did, or have further questions, let us know in the comments section.
Auto-Brightness on Chrome OS
At present, there is no way to control or tweak the auto-brightness settings on a Chromebook. However, it does have a limited ability to adjust brightness. According to this Chromium developer documentation,
| Power source | Direct sunlight (>= 400 lux) | Normal ambient light |
|---|---|---|
| AC | 100% (100% linear) | 80% (~62% linear) |
| Battery | 80% (~62% linear) | 63% (~37% linear) |
Auto-Brightness on Pixelbook
The Pixelbook has a better ambient light sensor. Hence, auto-brightness levels are more finely-tuned and consist of 7 levels as follows:
| Situation | Lux Step Down | Lux Step Up | Brightness UI | Brightness Linear |
|---|---|---|---|---|
| Low light | N/A | 90 | 36.14% | 10.75% |
| Indoor – normal | 40 | 250 | 47.62% | 20.00% |
| Indoor – bright | 180 | 360 | 60.57% | 34.00% |
| Outdoor – dark | 250 | 500 | 71.65% | 49.00% |
| Outdoor – overcast | 350 | 1700 | 85.83% | 72.24% |
| Outdoor – clear sky | 1100 | 7000 | 93.27% | 86.25% |
| Direct sunlight | 5000 | N/A | 100.00% |
Summary
As you can see, it is easy to adjust Chromebook screen brightness using the dedicated keys or the on-screen slider.
Do let us know your questions on Chromebook screen brightness using the comments form below.
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