Transient screen
A transient screen is a pop-up screen such as a notification or dialog screen on a mobile phone. It covers only part of the screen as well as dimming the remaining area. It helps to give the user a potentially high priority message, such as a new text message, voice mail or incoming phone call, either when the user gives the phone their attention, for example, by opening a flip phone or when running an application such as a game in the foreground.