When Power touch is on, you can tap the Power button twice to open shortcuts for selected apps and actions.
Set it up
Go to Settings > System > Gestures.
Or, open the Moto app and touch 


Customize the shortcuts
Go to Settings > System > Gestures.
Or, open the Moto app and touch 
Adjust the shortcuts:
You can customize the Power button so that pressing it twice opens your camera.
