Set First Point
When you choose this command, the selected point of a spline is defined as the new start point of the spline and the remaining points are re-sorted accordingly. If there are several segments within the spline, you can select a point or points within each segment; each segment will be re-ordered according to the chosen point(s) within it. If more than one point per segment is selected, the first point within the spline order is defined as the start point.
Remember that the start of a spline is colored white while the end is blue in color.