Create construction objects and points
Points and construction objects help you to place other objects in the model.
When you want to place objects to a position where no lines or objects intersect in the model, you can create construction lines , planes , circles , arcs , and polycurves. For example, you can easily pick the points at intersections of construction lines and circles. The snap priority of construction objects is the same as with the other lines.
Construction objects remain in the model when you update or redraw views and windows. They do not appear in drawings.
You can also create magnetic construction lines or planes to bind and move groups of objects. For example, rather than binding lots of handles and chamfers to part faces, simply create a construction planeconstruction object that represents a plane
that goes through all the handles and chamfers. Then make this plane magneticproperty of a rectangular grid, a grid plane, a construction line, and a construction plane that enables the attached model objects to follow when the object in question is moved
See also adaptivity.
and bind the plane to the appropriate face. When you move the plane, the attached handles and chamfers move with it.