To Change the Constraint Type of a Free Parabolic or Circular Vertical Curve
When Entity Based is selected in the Profile Layout Tools, you can unlock and change the constraint type of free parabolic or circular vertical curves in the Profile Layout Parameters dialog box.
Note: Unlocking and changing the constraint type is supported for free circular and parabolic vertical curves that are created with the Free Vertical Curve (Parabolic), Free Vertical Parabola (PVI Based), Free Vertical Curve (Circular) and Free Circular Curve (PVI Based) commands.
Click the profile. Click Profile tabModify Profile panelGeometry EditorFind.