328 Geometric Dimensioning and Tolerancing Profile of Coplanar Surfaces Coplanar surfaces are two or more surfaces on a part that are on the same plane. A coplanar profile tolerance can be used when it is desirable to treat two or more separate surfaces, which lie on the same plane, as one surface. To control the profile of these surfaces as a single surface, place a phantom line between the surfaces in the view where the required surfaces appear as lines. Connect a leader from the feature control frame to the phantom line and add a note preceding the feature control frame identifying the number of surfaces. Refer to the note 6X shown in Example 9-14. 0.6 profile tolerance zone The Meaning The Drawing Example 9-14. An application of a coplanar profi le tolerance. Note: A top view is also required to show and provide location and size dimensions to the six raised features. Example 9-13. An application of a non-uniform profi le tolerance.