You can enter the code 643212 on the lock. The buttons will appear once you touch the screen on the right bottom. Use the left arrow to count up. And the right arrow to move to the next digit. Once you've successfully entered the code the door will unlock.
You can turn the round knob to the right until it locks.
Turn the knob to the left to unlock the door
When you are outside, press and hold one of the touch buttons for 2 seconds.
(Even if the lock asks you to enter your pin code, you can still press one of the buttons for 2 seconds to lock the door.)