<P> When the Macintosh computer was introduced, WYSIWYG page layout using Aldus PageMaker became popular . The Macintosh rekindled interest in portrait displays, and the first portrait displays for it were developed by Radius Corporation . </P> <P> For the first computing devices a screen was built to operate in only portrait or landscape mode, and changing between orientations was not possible . Typically a custom video controller board was needed to support the unusual screen orientation, and software often needed to be custom - written in order to support the tall, narrow screen layout . </P> <P> As video display technology advanced, eventually the video display board was able to accommodate rotation of the display and a variety of differing resolutions and scan rates . After several years of producing the first Macintosh portrait display, Radius introduced the Radius Pivot CRT monitor, that could be freely rotated between landscape and portrait with automatic orientation changes done by the video controller . </P> <P> Rotation is now a common feature of modern video cards, and is widely used in tablet PCs (many tablet devices can sense the direction of gravity and automatically rotate the image), and by writers, layout artists, etc . Operating systems and drivers do not always support it; for example, Windows XP Service Pack 3 conflicts with monitor rotation on many graphics cards using ATI's Catalyst control software, Nvidia's proprietary drivers for Linux do not support screen rotation unless manual changes are made to its configuration . </P>

Name the types of page orientation available in ms word