What you'll need
The Curvature tool gives you a new way of drawing smooth curves and straight lines to quickly get just the results you want.
Select the Curvature tool from the Tools panel. Before starting to use the tool, set your stroke as a solid stroke color, with no fill selected, and make the Draw layer active in the Layers 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.
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.