To Calculate the Line Chain Center
1. Click > 
Calculate Line Chain Center. The Calculate Chain’s Center dialog box opens.
Calculate Line Chain Center. The Calculate Chain’s Center dialog box opens.2. Click a button to select the curves and edges to use to determine the center:
◦ 
—Select a chain of curves or edges.
—Select a chain of curves or edges.◦ 
—Select individual curves or edges.
—Select individual curves or edges.◦ 
—Discard selected curves or edges.
—Discard selected curves or edges.◦ 
—Highlight selected curves and edges.
—Highlight selected curves and edges.3. Select a base coordinate system.
4. Click 
to calculate the line center point.
to calculate the line center point.5. Click 
to create the calculated line center point.
to create the calculated line center point.6. Click Close.