ViewPoint—Wolfram Mathematica 9 Documentation

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ViewPoint->{x, y, z} gives the position of the view point relative to the center of the three-dimensional box that contains the objects.
The view point is given in a special scaled coordinate system in which the longest side of the bounding box has length 1. The center of the bounding box is taken to have coordinates .
Common settings for ViewPoint are:

	Above	above, along the positive z direction
	Below	below, along the negative z direction
	Front	in front, along the negative y direction
	Back	at back, along the positive y direction
	Left	left, along the negative x direction
	Right	right, along the positive x direction
	{Left, Top}, etc.	corners

Choosing a ViewPoint farther away from the object reduces the distortion associated with perspective.
Infinite coordinates can be used to specify orthographic views: »

	{0,0,Infinity}	view from above (plan view)
	{0,0,-Infinity}	view from below
	{0,-Infinity,0}	view from the front (front elevation)
	{0,Infinity,0}	view from the back
	{-Infinity,0,0}	view from the left
	{Infinity,0,0}	view from the right

The coordinates of the corners of the bounding box in the special coordinate system used for ViewPoint are determined by the setting for the BoxRatios option.
In a notebook front end, dragging with the mouse rotates a 3D object, by changing the azimuthal components of ViewPoint, as well as the setting for ViewVertical.
Dragging with the mouse while pressing Ctrl, Alt, or Option zooms in or out, changing the value of ViewAngle, but keeping ViewPoint fixed.
Explicit settings for ViewVector or ViewMatrix override settings for ViewPoint.