O que você precisará
Select the Curvature tool from the Toolbar. Before starting to use it, set your fill color to None and select a stroke color in the Properties panel.
Click once in the center of each circular guide. It takes only four clicks to make a perfect circle.
Click once to create your first point. Then double-click the center of each of the other circular guides. Each double-click creates a corner point with a straight line in between. To complete the shape, double-click the first point you placed.
In Exercise 4, the path has already been created. First use the Selection tool to select the path. Then switch to the Curvature tool and double-click the center point at the bottom to make the corner a smooth curve. To practice, click the straight line segment directly above and drag out a smooth curve. To delete the point, click to select and press Delete.
In Exercise 5, the path has already been created. Use the Selection tool to select the path, and then switch to the Curvature tool. Drag the middle points to adjust their curves as shown.
You’re getting the hang of it, keep practicing! Trace the artwork on the artboard below, and try changing the fill and stroke colors of your drawing. Then use these techniques to draw elegant curves and lines in your own designs.