While Android 4.0 introduced a pop-up notification slider, for Jelly Bean this was totally overhauled and called the Notification Shade. You open this by sliding your finger down from the top-left corner of the home screen, the top-right now also opens the Settings Shade
But there’s more to the Notification Shade than you might think Interestingly notifications can be expanded by pinching a notification. Pinch out gives you an expanded overview of the subject headers in your email inbox or will show you more of a screenshot with additional sharing options. Pinch inwards and the notification shrinks them back to a single slot.