Joke Collection Website - Public benefit messages - How did the vivo message become black and white?

How did the vivo message become black and white?

Just set it up.

By setting, Vivo messages can be displayed on black characters on a white background. Enter Settings-Quick Assist-Auxiliary Function/Auxiliary Function-Color Reversal-Turn on the switch to view.

Note: The purpose of color inversion is to enhance the contrast of the displayed content, so that people with poor recognition ability for low-contrast content can clearly distinguish it.