Huawei P9 Lite - Manual (Page 192)

Accessibility Features
185
Adjusting the screen response time
You can adjust the time that it takes for your phone to respond to gestures, such as touch
and hold.
1
Open Settings.
2
Touch Advanced settings > Accessibility > Touch & hold delay.
3 Select the desired delay time: Short, Medium or Long.
Color correction
Color correction mode adjusts colors to make it easier for color vision impaired users to
distinguish between different parts of the screen.
Enable this mode with caution, as it may affect your phone's battery.
1
Open Settings.
2
Touch Advanced settings > Accessibility and then turn on the Color correction switch.
3 Touch Correction mode and then select a correction mode.