What are the Key options of Samsung Gear S2(SM-R720)?

 Press :

 Return to previous screen

 Double-click :

 None

 Press and hold :

 None

 Press : 

 Open the Apps screen when you are on the

 Watch screen. Or, open the Watch screen when

 you are on any other screen.

 Double-click :

 Default none (Customizable to load Favorite

 App by User)

 Triple press :

 Default none (Can set for Safety Assistance)

 Press and hold :

 Gear Options (To turn the Gear on or off) Press

 and hold for more than 7 seconds to restart.