Lets you create reference vectors for use as input to tools that require a point or vector.
Align curves and surfaces with continuity
Pull surfaces from curves of an existing surface
Create or edit a reference vector
Shade a surface with its draft angles
Reference vectors mark a starting point and direction. They are useful as input to tools that require a direction (such as the pull direction in tools measuring draft angles).
Show the name of the vector next to it in the view window. This options is off by default.
