After drawing splines, a Spines layer is added to the Layer Control panel, Select the Splines layer then LMC on a spline in the workspace, it will be highlighted in red. Next, RMC on that spline to display options as shown in Splines Operation.
Break Splines: Selecting this option will split the spline into two splines
Insert Splines Control Point: Selecting this option will add a spline point
Delete Splines Control Point: Selecting this option will remove a spline point
Delete Splines: Selecting this option will remove the spline
Copy Splines: Selecting this option will copy that spline to other splines layer. After selecting this option, the Select Layer form will pop up as shown in Splines Operation. From the drop-down list, we can select <New Layer> or an available splines layer there.
Clear Selection: Selecting this option will clear the selection of that spline. The spline will not be highlighted.
Figure 1 Draw splines procedure.
Figure 2 Copy Spline.