Manually lock screen

I would like to lock the computer when not at home but leave the computer unlocked at home.

If I choose to lock the Mac after the screen saver starts I can lock it with control+shift+power but then these settings will also force me to enter the password when I am home.

Is there a way to manually force a lock without locking the screen saver?

Solution 1:

If you don't want to reduce the time for a password prompt after the screen saver starts you can use Keychain Access. Start it and in the preferences choose to show the status in the menu bar

You will be then able to lock the screen immediately with Lock Screen: