- 
        Select two Surface Extensions to connect.
        
          - 
            Select the first edge or surface extension. 
          
 
          - 
            Select the second edge or surface extension. 
          
 
         
        If you pick a Surface Extension, the planes are displayed for local
          modification. 
        A Connect Surface is created between the two selections. 
       - 
        If the tension of the result is not satisfactory, or if the inputs are not Surface
          Extension, expand the Parameters section.
      
 - 
         Select the Part Surface, that is the surface on which extended
          surfaces have been created leaving a gap. 
      
 - 
        Specify continuity options (Curvature or
            Tangent). 
        
      
 - 
        Specify the tension values for both sides.
        
      
  
   
  
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