Easy when you know how!
1. Double click Home button – or on an iPad you can 5 finger swipe up – to get the taskbar.
People are used to holding their finger on the icons until they wiggle and then using the little black cross top left to close the app. Not in iOS 9.
2. You will now see a series of open screenshots of apps you have been using. Slide them up with you thumb as in the video or, if you are like me and don’t have good use of your thumbs, hold your finger on the open image and slide it up.