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The images may also function as animation frames in an animated GIF file, but again these need not fill the entire logical screen. GIF files start with a fixed-length header ("GIF87a" or "GIF89a") giving the version, followed by a fixed-length Logical Screen Descriptor giving the pixel dimensions and other characteristics of the logical screen.
Mid-generation hardware revisions and new models introduced by Sony and Microsoft to their respective PlayStation 4 and Xbox One consoles added the capability of outputting at 4K UHD — well beyond 1080p. [30]