• Best Fit—Created through several measure or construct steps. You must select at least 3 measure or construct steps of the type point, circle, cone, or sphere. If you select more than 3 measure or construct steps, the plane is constructed to provide the best fit for all the selected points.

• Midplane—Created midway between 2 measure or construct steps of type plane. The measure or construct planes can be at any angle to each other.

• Normal—Created using 2 measure or construct steps. The constructed plane passes through a measure or construct step of type point, circle, cone, or sphere and is normal to a measure or construct step of type line, cylinder, or cone.

• Parallel—Created using 2 measure or construct steps. The constructed plane passes through a measure or construct step of type point, circle, cone, or sphere and is parallel to a measure or construct step of type plane.

• Theoretical—Created with reference to a datum plane.