The new Amazon Fire HD 10 sports a 10.1 inch, 1920 x 1200 pixel display that Amazon says is 10-percent brighter than one on its previous-gen tablet.
First, reset your display to its default … This product does what it is advertised to do.
How to Adjust Screen Brightness - ThinkCentre, ThinkPad SHOP SUPPORT. This can be accessed by opening Control Center or from within the Settings app. If you aren’t able to determine the shades, adjust your monitor’s brightness. I'm assuming it goes down a little on battery but still brighter than having it set to the auto setting.
The first section on this screen will say either Brightness and color or just Color, depending on your computer. How to make my laptop screen brighter than normal System Preferences, click Displays, then click Display.