Filling a Concave Area

1. From the Die Face section of the action bar, click Fill Concave Area .
2. Select one vertex on each side of the concave area opening.

   The vertices can be on the same support or not.

3. Right-click the spline and apply or remove a tangency constraint from the context toolbar.
4. To change the position of a vertex:
   • Drag it on the boundary (within Fill Concave Area).
   • Outside Fill Concave Area, double-click a point in the tree.
   • Edit the length parameter of the point.

A Fill Concave Set is created under Clean Contour. It contains the Fill Concave Area feature with:

• One boundary (Vertices are on the same support) or two boundaries (Vertices are on different supports).
• The selected vertices (Point on Curves features).
• A join of the supports, if the vertices are on two different supports.
• Two Stable Split Curves computed from the vertices (One for the smallest area, one for the largest area).
• A Spline.
• A Fill.

Double-click the Fill Concave Area to edit the vertices.