Appears at the top of the centre display. Requires direct action and can have up to three buttons that allow the user to deal with the message. Dismiss by sweeping right or left, the message is then saved in notification view. Displayed as a window in the centre display and requires direct action. May have 1-3 buttons for action.Appears for a few seconds at the top of the centre display. It is not possible to do anything with this notification, and it is not saved anywhere.