For devices that have full control of the screen (such as tablets and embedded devices) the backlight brightness can be controlled by setting
screenBrightness to a value between
1. The brightness setting can be added as data to the screen, sequence or item.
If brightness is set on a screen it can be overridden by an item. For example, adding
screenBrightness=1 to an image would set maximum brightness when it displays.
||Set the brightness of the screen. (Android with built in screen only)|