You can customize the Power button, controlling what happens when you press it twice and when you press & hold it.
- Choose what happens when you press & hold Power
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- Go to Settings > Gestures.
- Tap Press & hold power button.
Choose what you want the gesture to do:
If you select a choice other than Power menu, then to see the Power menu for turning off and restarting, you'll need to press the Power + Volume up buttons simultaneously.
- To adjust how long you need to press & hold to start the selected action, move Press & hold duration.
- Choose what happens when you press Power twice
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- Go to Settings > Gestures.
- Tap Double press power key.
- Choose if you want to open the camera or to start a voice command. If you don't want anything to happen, choose No action.