yeah alright. This button is like the mouse  is like a joystick ,
you can move in three hundred and sixty degrees of direction so you can make a turn and it  the additi functions associated to all the actions you ma you have a click you have a double click all in a single button .
Mm.
You can move up , down , left , right , or you can do a swing. So a swing to the left , a swing to the right defines other functions. So even though it's a single button , but it is pretty s flexible because of the three hundred and sixty degree movement .