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        From the 
          
           section of the action bar, click  
           
          Circle
           
           .
        In the Circle type list, select Center and
            axis.
      
        In the Axis/line box, select an axis or a line.
        It can be any linear curve.
        In the Point box, select a point.
      
        In the Radius box, type the value or use the arrows to change
          the value.
        
           Note:
			To switch to diameter, click  . Depending on the active Circle Limitations, the
          corresponding circle or circular arc is displayed. For a circular arc, you can specify the
            Start and End angles of the
          arc.
        To specify the axis computation mode, select the Axis
            computation check box.
      
        Click OK to create the circle or circular arc.
        The circle (identified as Circle.xxx
          ) is added to the tree.
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