Use this dialog box to specify the type of curve to be placed between tangents in a profile.
Curves of the type defined here are used if you select the 
Draw Tangents With Curves button on the Profile Layout Tools dialog box.
After you select which of the three vertical curve types to use, specify the related parameters for crest curves and sag curves as follows:
- Parabolic: Specify either curve length or K value.
- Circular: Specify either curve length or radius.
- Asymmetric: Specify separate lengths for the parabola in (Length1) and the parabola out (Length2).
Click OK to save the settings.