Arrow

Arrow[{pt1,pt2}] is a graphics primitive that represents an arrow from pt1 to pt2.

Arrow[{pt1,pt2},s] represents an arrow with its ends set back from pt1 and pt2 by a distance s. 

Arrow[{pt1,pt2},{s1,s2}] sets back by s1 from pt1 and s2 from pt2. 

Arrow[curve,…] represents an arrow following the specified curve.

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