Location: Modify>Curve>Reverse Direction
Use this function to reverse the start and end point vector direction for a given curve.
Using this Function:
Open Modify>Curve>Reverse Direction and cursor select an existing curve.
The start and end vectors will appear on the curve. The start Vector points at the curve and the end point projects away from the curve.
To alter the direction, cursor select the curve again and note the start/end points reverse.