Hi, my name is ***** ***** certified professional with over 10 years experience. I will be glad to assist you with this. You can swipe down from the top of your screen. The screen brightness adjustment is just under the settings icon.
To adjust the brightness of the display swipe your finger from the top of the screen to the bottom to open the Notification Panel.
The display brightness adjustment bar is shown just below the Quick Panel shortcuts. Touch Auto to turn on Automatic brightness (which will allow your device to select the level of brightness based on your remaining battery charge).
To manually adjust the brightness touch and slide the bar to the right for a brighter screen or left for a darker screen.
You can also access the display settings from the Home screen by touching Apps > Settings > Display.