Select 2D or 3D mode, then enter functions for the vector components. Use x, y, and z (for 3D) as variables.
x
y
z
Examples: -y, x*y, Math.sin(x), Math.cos(x*y)
-y
x*y
Math.sin(x)
Math.cos(x*y)
3D Mode: Click and drag to rotate the view, scroll to zoom.