He pressed the button to call the lift.

He takes a handful of the foot powder from his pocket and blows it on the keys.

After this, you are presented with a wireframe outline of the trackpad, and two mouse buttons.

And there' s a feedback button to tell us what we might have wrong or how to improve the handbook.

The user looks into the eyepiece and uses the buttons on the phone to move two lines until they appear as one.