Motorola Moto G7 Play Manual page 22

Set up phone : Accessibility settings
1. Go to Settings
2.
Touch Volume key shortcut and turn it on
3. To change the accessibility feature associated with the shortcut, touch Shortcut service.
4.
To use the Volume buttons from the lock screen, turn Allow from lock screen on
To use the shortcut:
Press and hold the Volume Up and Down buttons at the same time for three seconds.
You'll hear confirmation that the feature has been turned on or off.
> Accessibility.
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