Double click button, get rid of icons at bottom of screen
On my old ipad (retina display; it was stolen) I could double click that button on the side and it would show me all the apps I'd accessed at the bottom of the screen. I could then delete them. Some one told me that if I didn't do that, my machine would eventually run slower. I can't seem to do that with the ipad air (v 7.0.4).
Does anyone know how to do that? Or does it matter?
Thanks!
iPad Air Wi-Fi, Cellular, iOS 7.0.4