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Landscape is a horizontal orientation mode used to display wide-screen content, such as a Web page, image, document or text. Landscape mode accommodates content that would otherwise be lost when viewed to the left or right. Portrait mode is landscape's counterpart.
The landscape term is derived from visual artwork or photography requiring a wide viewing angle.
Landscape is the most popular video display orientation and has an average ratio of 4:3 units (wide to vertical). Larger wide-screen displays have a 16:9 ratio.
Image rotation between landscape and portrait modes is a default feature for most software applications. However, not all OSs support this capability. For example, Windows XP Service Pack 3 conflicts with this feature on multiple graphics cards.
Issues may arise with rotating cathode ray tube (CRT) monitors after changing from landscape to portrait mode, as follows: