Transient screen

Source: Wikipedia, the free encyclopedia.
A transient screen on mobile Wikipedia notifying the user about the new user interface for mobile editors.

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

flip phone or when running an application such as a game
in the foreground.