Reference points, like reference elements, can be used to "anchor" portions of the master part in place, so that they maintain their positions in the variation.

To assign a reference point constraint to a model point that is not usually visible, e.g., circle centers, spline control points, or text centers, you must first display them with SHOW Vertex ON and then pick them directly.

A reference point can also be used to supply data to macros or expressions when given a parametric value. If you supply a parameter label when assigning a reference point, the coordinate value of the point can be accessed in an expression by referencing the parameter name.