Translation Vector
The translation vector is a visual representation of the line along which an animated group of surfaces will move. To modify the position and orientation of this line, you will manipulate the representation.
The translation vector can be selected at one of three points that allow it to be manipulated: its center, and its endpoints. When it is selected at an endpoint, only that endpoint will be repositioned, which will change the direction of the vector. If it is selected at its central point, both endpoints are moved when the position is modified. This results in the entire vector being moved.