Tools > Path > Symmetric
Symmetric
The Symmetric command allows you to turn the selected node into a symmetric (green) node. The two control points that control the gradient of the selected node become symmetric to each other. The result is no longer a sharp node, but a curve. To widen the curve, grab one of the control points and pull outward. With a symmetric node, both control points behave the same way, lengthening by equal amounts. The two control points always form a straight line.
1. Do one of the following:
 Choose Tools > Path > Symmetric
 Press Ctrl+Shift+S
 Click the Symmetric button on the toolbar
Related Information
Tools > Symmetric Shape
Tools > Symmetric Shape > N - Sided Polygon
Tools > Symmetric Shape > N - Pointed Star
Tools > Symmetric Shape > N - Pointed Cross
Tools > Symmetric Shape > 2 - Points
Tools > Symmetric Shape > 3 - Points
Tools > Symmetric Shape > 4 - Points
Tools > Symmetric Shape > Transform into Polygon
Tools > Symmetric Shape > Transform into Bezier
Tools > Symmetric Shape > Transform into Selection
Search the Internet