# Points of intersection (PI) entry method

As you add each element to the alignment, fill out the fields required for the selected element type.

1. Define the points of intersection.
2. Select the Curve type. If you select:
   - Circular, enter the Radius and Arc length.
   - Transition|Arc|Transition, enter the Radius, Arc length, Transition length in and Transition length out.
   - Transition|Transition, enter the Radius, Transition length in and Transition length out.
   - None, no further values are required.
3. Tap Store.