Open a new part, and in the FeatureManager design tree, select the Top plane.
Click 3D Sketch
On Plane 
(Sketch
toolbar).
Open a new part, and in the FeatureManager design tree, select the Top plane.
Click 3D Sketch
On Plane (Sketch
toolbar).
A 3D sketch plane created on the Top plane is displayed.
Click Centerline
(Sketch toolbar),
and sketch a vertical construction line through the origin.
Click Add
Relation 
(Dimensions/Relations
toolbar).
In the graphics area, select the construction line and the origin for Selected Entities.
In the PropertyManager, under Add Relations, click:
Midpoint
Coincident
Click 
.
