Brightness Control and Bluelight Filter

Brightness control in Librera Reader can be automatic, according to your system settings, or the user can set brightness manually. Brightness can be changed in the Preferences window, or by sliding a finger along the left edge of the screen (check the corresponding box to turn this mode on). Negative brightness indicates that your setting is darker than the system’s one. Negative brightness enables the bluelight filter and color Black by default.


Bluelight Filter

Bluelight filter depends on your brightness setting, it turns on automatically when the brightness setting has a negative value.