| mediums |
In this chapter, we use a medium as a destination for output. The medium has a drawing plane, two designs (called the medium's foreground and background), a transformation, a clipping region, a line style, and a text style. There are per-medium, dynamically scoped, default drawing options. Different medium classes are provided to allow you to draw on different sorts of devices, such as displays, printers, and virtual devices such as bitmaps.
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