Press the car symbol 
in the bottom bar and go to Settings.
in the bottom bar and go to Settings.Go to .
Press Enable.
Select your preferred lock type and follow the instructions in the display.
If you want to change the profile lock, press Edit.
Restricting access to a profile
You can restrict access to a profile by adding a profile lock. When a profile lock is active, you need a PIN, pattern or password to unlock the profile.