Sketching on 3D Sketch Planes Open a new part, and in the FeatureManager design tree, select the Top Plane. Click 3D Sketch On Plane (Sketch toolbar) or Insert > 3D Sketch On Plane. A 3D sketch plane created on the Top Plane is displayed. Set the View Orientation to view normal to the Top Plane. 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 . Parent topic3D Sketching with Planes Previous topic Approaches to 3D Sketching Next topic Adding and Dimensioning a Line