* Change On battery to On for enabling adaptive brightness to extend battery life, while turn it off when plugged in, and click Apply > OK button to save all. Within the submenus, click on the + sign next to “Enable adaptive brightness”. * In the pop up Advanced Settings, click on the plus sign next to Display” section.
* Click on “Change advanced power settings” at the bottom. * It will open the Power options in Control Panel, under Choose or customize a power plan, click on “Change plan settings” link next to your selected power plan (By default it is Balanced). You can also press-and-hold or right-click the battery icon in the system tray of taskbar, and click on Power Options from the menu. * From your desktop, type Power Options in the Cortana Search box or the Start menu, and select the top one from result.
How To adjust maximum screen brightness in Windows 10 manually
