Huawei Mate 20 Lite User Manual page 124

System
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.
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