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PDF documents are generally composed of a combination of text, vector graphics and raster graphics. Vector graphics are used to display the illustrations that formed from the lines and curves, while the raster graphics are used to display photos and images. On further improvement of formats, PDF documents are also capable of supporting hyperlinks, forms, javascript, and various other abilities that can be supported by adding plugins. PDF document version 1.6 already has the ability to display three-dimensional interactive graphics.