Share Email Facebook Twitter LinkedIn To Create Symmetrical Polylines (AutoCAD Mechanical Toolset) Click Home tabDraw panelSymmetrical Line. Find Select an existing centerline , or create a centerline by specifying a starting point and an endpoint. Specify the points that define the polyline. The line is mirrored along the centerline. Related Concepts About Tools to Draw Special Lines (AutoCAD Mechanical Toolset) Related Tasks To Create a Section Line (AutoCAD Mechanical Toolset)To Create a Break-Out Line (AutoCAD Mechanical Toolset)To Create a Zigzag Line (AutoCAD Mechanical Toolset) Related Reference AutoCAD Mechanical toolset Commands for Creating Special Lines