# Start and end point entry method

1. Select the Element. If you select:

   - Point, enter the Station and Elevation to define the start point.

   - Circular arc, enter the Start station, Start elevation, End station, End elevation and Radius to define the circular arc.

   - Symmetric parabola, enter the Start station, Start elevation, End station, End elevation and K factor to define the parabola.

   The other fields show calculated values. Depending on the selected element, these may include Length, Slope in, Slope out, K factor and Sag / Summit values.

2. Tap Store.

When you edit an element, only the selected element is updated. All adjoining elements remain unchanged.