This is documentation for Mathematica 7, which was
based on an earlier version of the Wolfram Language.

 Arrowheads[spec]is a graphics directive which specifies that arrows which follow should have arrowheads with sizes, positions and forms specified by spec.
• With the default a single arrowhead is placed at the head of each arrow.
• Arrowheads[s] specifies that arrowheads should have a length that is a fraction s of the total width of the graphic. The default is 0.04.  »
• The symbolic values Tiny, Small, Medium and Large can be used for s. With these values, the size of the arrowhead is independent of the total width of the graphic.  »
• Arrowheads[{spec1, spec2, ...}] specifies that arrows should include several arrowhead elements.
• Each arrowhead element can be specified as follows:
 s default arrowhead with scaled size s {Automatic,pos} default arrowhead at position pos {s,pos} scaled default arrowhead at position pos {s,pos,g} arrowhead drawn as graphic g {s,pos,{g,}} shaft foreshortened by
• The position pos runs from 0 to 1 from the tail to the head of the arrow.
• Arrowheads[{s0, s1, ..., sn}] specifies arrowheads with scaled sizes si at positions i/n.  »
• The graphic g is placed so that the origin of its coordinates lies at position pos along each arrow.
• The graphic g is oriented so that its positive x axis is aligned with the direction of the shaft at position pos.
• The graphic g is scaled so that one unit of its coordinates corresponds to a fraction s of the width of the whole graphic in which the arrow is being drawn.
• The graphic g is always assumed to have .
• With the specification {s, pos, {g, }}, the shaft of the arrow is foreshortened by in the coordinate system of g. This can prevent a thick shaft from "poking through" arrowheads at the head or tail of the arrow.  »
• In 3D, the default option setting Appearance->"Flat" makes arrowheads always be rendered in the plane of the screen. Appearance->"Projected" makes them be rendered in 3D, and projected into the plane of the screen.
A 2D arrow:
A 3D arrow:
A full 3D arrow primitive using tubes:
A 2D arrow:
 Out[1]=

A 3D arrow:
 Out[1]=

A full 3D arrow primitive using tubes:
 Out[1]=
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