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PDF graphics use a device-independent Cartesian coordinate system to describe the surface of a page.
For questions on access or troubleshooting, please check our FAQs, and if you can''t find the answer there, please contact us.Paths are usually composed of lines and cubic Bézier curves, but can also be constructed from the outlines of text.Unlike Post Script, PDF does not allow a single path to mix text outlines with lines and curves. Strokes and fills can use any color set in the graphics state, including patterns. The simplest is the tiling pattern in which a piece of artwork is specified to be drawn repeatedly.Any files, graphics, or fonts to which the document refers also are collected. Therefore, the entire Post Script world (fonts, layout, measurements) remains intact.As a document format, PDF has several advantages over Post Script: ). Objects may be either direct (embedded in another object) or indirect.