Filling a Concave Area

1. Click Fill Concave  Area in the Part Extension toolbar.
   

2. Select one vertex on each side of the concave area opening.
   The vertices can be on the same support or not.
   
   

3. In the contextual toolbar, apply or remove a tangency constraint.

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.

5. Click OK.
   

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.