Edge touch adds an action bar to your screen, which you can use to access shortcuts and to move between screens.
To remove or restore the action bar:
Go to Settings > Display.
Or, open the Moto app and touch 
Adjust settings for the action bar:



You can customize the shortcuts that appear when you tap the action bar twice.
Go to Settings > Display.
Or, open the Moto app and touch 
Adjust the shortcuts: