How do I set up screen lock on my T6 Pro thermostat to prevent unauthorized access?

To apply a screen lock, touch Menu on the home screen, navigate to SCREEN LOCK using the arrows, select either Partial lock (temperature changes only) or Full lock (requires PIN for any access), then touch Select. A PIN number will appear on screen—write it down and keep it safe. Confirm your lock setting by touching Yes. A lock symbol at the bottom of the screen will indicate the thermostat is locked.