How do I change the shortcut for lock screen?

Solution 1:

You can do this by following this webpage instructions :

  1. Open System Preferences
  2. Open Keyboard Preference Pane
  3. Go to Shortcuts tab
  4. Select "App Shortcuts"
  5. Click "+"
  6. Select "All Applications", "Lock Screen" and type your shortcut.
  7. Quit System Preferences