If you're interested in becoming a tester, you can do so by hitting the button below which will take you to the signup page. (androidheadlines.com)
Just hit a button when the contraction starts and the end button when it's over. (ourfamilyworld.com)
You can easily close individual apps by swiping across them, but also all of them at once by hitting the button at the base of the display. (techradar.com)