"To adjust the brightness" means to change the amount of light that is emitted from something, such as a screen or a light bulb, to make it brighter or dimmer. Full definition
In addition to being our brightest front light ever — 39 % brighter — the new adaptive front light automatically adjusts the brightness of the display based on the surrounding light. (phx.corporate-ir.net)
The new adaptive front light automatically adjusts the brightness of the display based on your environment, and can even be fine - tuned further to your personal preferences. (goodereader.com)
- Smart touch sensor design, simply turn on / off light and adjust the brightness on the screen. (amazon.co.uk)