It's running along the bottom of the screen at the moment. (arsenalarsenal.net)
Using buttons along the bottom of the screen, you can return to your recent searches or view a list of your saved documents. (lawsitesblog.com)
But the simplest way to switch apps is to just swipe along the bottom of the screen, left or right, as if there was some kind of control strip there. (cultofmac.com)