Lock Screen-is especially useful for those who want to block access to Mac, when he leaves in front of him for a period of time. After blocking the screen, access to the system can only be done with word. 
In this little tutorial we will show you two simple variants of the quick lock of Screento. 
The first option is a combination of keys (keyboard shortcut). We press the keys simultaneously:
CONTROL + Shif + EJECT
The second method, involves adding Keychain Access in menu bar.

We open Keychain Access, we go to Preferences > General (tab) > bifam “Show keychain status in menu bar“.

After ticking this option, the Keychain Access (a lock) icon, which gives us quick access to the screen block, will appear. Lock Screen.

NOTA: Tutorial Testat Pe Macbook Pro Cu Mac OS X Mavericks.
STEALTH SETTINGS -Fast access to locking the screen (Lock Screen) on Mac OS X
 
			