To Create a Surface Extension To a Plane
1. Select a boundary edge of a surface in the graphics window.
2. Click > 
Extend on the Import DataDoctor ribbon tab. The Extend tab opens.
Extend on the Import DataDoctor ribbon tab. The Extend tab opens.3. Click 
on the Extend tab to extend the surface up to a selected plane. The boundary edge that you selected appears in the Boundary edge collector in the References tab.
on the Extend tab to extend the surface up to a selected plane. The boundary edge that you selected appears in the Boundary edge collector in the References tab.4. Select a plane on the GTS Tree or in the graphics window, to be used as the reference.
5. Click 
on the Extend tab. IDD extends the selected surface.
on the Extend tab. IDD extends the selected surface.