To add an anchor on an existing curve
         
         
            - Select the Bezier curve.
            
 
            - Hold  
  on the curve and select Curve
                  Point from the marking menu.
             
            - Click the curve where you want to insert
               an anchor.
            
 
            - Select 
                        Edit Curves > Insert Knot.
               
Maya inserts an anchor
                  into the curve with a pair of tangents.
               
             
         
         To append anchors to the end of an existing
            curve
         
         
            - Select the curve you want to append to.
            
 
            - Select 
                        Create > Bezier Curve Tool or
               click the Bezier Curve Tool icon ( 
 ) in
               the Curves shelf.
             
            - Click the last anchor in the curve.
               
The last anchor is always
                  the end point of the curve that is not yellow.
               
             
            - Click (or click-drag) anywhere in the
               scene.
               
An anchor appears and
                  is connected to the curve.
               
             
         
         To remove an anchor
         
         
            - Hold  
  on the curve and select Control
                  Vertex from the marking menu.
             
            - Select the anchor.
            
 
            - Press  
 .
               The anchor is deleted.
               
               NoteYou cannot remove
                     tangents the same way as removing an anchor. For more information,
                     see 
                              Add / Remove tangents.