It really does matter where you place a geometric tolerance. Often it can change the meaning. Other times it can be just plain wrong. Profile of a surface is often applied incorrectly. It is called “profile of a surface”. It applies to a feature’s surface. Therefore, it must be applied to surfaces on a drawing.

On this drawing, two profile of a surface tolerances have been applied incorrectly. They are shown crossed out on the drawing. The profile of a surface tolerance labeled “OK” illustrates proper application of a surface control.