Create Vectors
Define vectors in 3D space.
In the modeling window, vectors are displayed as an arrow with the letters VEC and their vector size value at the tail end. By default, vectors are displayed using a representation of 100% of their actual length.
You can create several vectors at a time by selecting nodes and either a magnitude, or by deriving them from a line tangent or surface normal. Single vectors can be created by selecting two nodes or by deriving them from the cross product of two existing vectors.