Arrowheads—Wolfram Mathematica 9 Documentation

Details and Options Details and Options

With the default Arrowheads[Automatic], 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, ..., s_n}] specifies arrowheads with scaled sizes at positions . »
Arrowheads[{-s, s}] gives double-headed arrows. »
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 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 AspectRatio->Automatic.
With the specification , 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.