How do I lock the Latch C?

Latch C

To lock Latch C, simply tap the center of the black circle to lock.

Latch C2

To lock Latch C2, simply turn the thumb turn towards the door frame.

Latch M

Latch M automatically locks 10 seconds after unlocking

Latch R

Latch R automatically locks after 5 seconds or 10 seconds depending on how you have configured it.