The dxf terminal driver creates pictures that can be imported into AutoCad
(Release 10.x). It has no options of its own, but some features of its plots
may be modified by other means. The default size is 120x80 AutoCad units,
which can be changed by set size. dxf uses seven colors (white, red,
yellow, green, cyan, blue and magenta), which can be changed only by
modifying the source file. If a black-and-white plotting device is used, the
colors are mapped to differing line thicknesses. See the description of the
AutoCad print/plot command.