Thank you for your support of Xiaomi products. Each tablet undergoes rigorous quality checks before leaving the factory, ensuring reliable performance. The automatic brightness feature adjusts the screen brightness based on real-time environmental conditions. However, subjective differences in display content can affect your perception of brightness. If you find the screen too bright or too dim, you can manually adjust the brightness by sliding down the notification shade. This adjustment allows you to fine-tune the screen brightness to better match your preferences and improve your overall viewing experience.