1) Click with 2 fingers at the same time in screen
2) I just a default name don't think about it too much
Even if it is my phone, not all phones are programmed to recieve the same inputs the same way.
My friend's phone lets you run an active app in the background by swiping down. They are annoyed by it, since it keeps going to the home screen when they are trying to scroll through menus. I think they use iOS. I doubt it's windows. Their tech friend in another city said they need to disable it in "Gestures". If they find it, I'll look for it on my Android and see if I can set two-finger tapping to X… or… whatever the backspace key is supposed to be.