Other Modules > Modifying Geometry > Modifying Splines > To Modify a Spline by Adding Points
  
To Modify a Spline by Adding Points
1. Click Add Pnts on the MOD SPLINE menu. The NEW POINTS menu displays the following:
Interior—Adds points to the interior of the spline.
Exterior—Extends the spline by adding points beyond its current endpoints.
2. Click Interior.
3. Pick any location on the spline between any two existing points or click Exterior.
4. Pick the spline endpoint to extend.
5. Pick additional points.