To Copy Surfaces Inside a Closed Sketched Curve
1. In the graphics window, select the surface or surfaces to copy.
2. Click Model > Copy, or press CTRL+C. The selected surfaces are copied to the clipboard.
3. Click Model > Paste, or press CTRL+V. The Copy tab opens.
4. Click the Options tab, and select Copy Inside boundary, or right-click and choose this command from the shortcut menu.
5. Select a closed curve, or set of curves that will close, that lies on a quilt.
6. Click OK. The specified inside boundary is copied.