Using the Spline Tool in Equator
Select the Spline Tool
Begin by selecting the spline tool from the insert menu on the right (shown below in red).
Using the Spline Tool
To use the spline tool, begin by dropping a point where you would like to begin your spline. Then, continue placing points around the area you would like to outline. The spline tool will automatically bend to connect the points as smoothly as possible.