Huawei P20 User Manual page 138

Select an item: Touch an item with one finger to select it (it will not open). Your device will read out
the content of the selected item.
Open an item: Double-touch any part of the screen using one finger to confirm your selection from
the previous step.
For example, if you want to open Settings, touch the Settings icon once using one finger, and then
touch twice anywhere on the screen.
Use Text-to-Speech Output with TalkBack
The text-to-speech feature can read aloud texts on the screen of your Phone. It can also be used with
the TalkBack service to help visually impaired users interact with their devices.
Open Settings, go to Smart assistance > Accessibility and enable Text-to-speech output.
Configure your preferred engine and speech rate to enable this feature.
Enable Colour Correction
The colour correction setting enables your device to compensate for the effects of colour blindness.
When colour correction is enabled, users with normal colour vision may have difficulty viewing
some colours.
Open Settings, go to Smart assistance > Accessibility > Colour correction and enable Colour
correction. Touch Correction mode to select the required colour correction mode.
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