To adjust the brightness on the screen all one needs to do is swipe with their finger downward from the top of the screen once to view some of your quick action tiles and all active notifications and then once again to view the screen brightness adjustment bar open all your quick action tiles.

One can view and move all the various quick action tiles by tapping the pencil icon below the tiles on the right of the screen.

The video HERE will walk you through exactly how to do this.