After drawing polyline, an Overlay layer is added to the Layer Control panel, Select the Overlay layer then LMC on a polyline in the workspace, it will be highlighted in red. Next, RMC on that polyline to display options as shown in Figure 1.
Properties: Selecting this option to set properties of the polyline as shown in Figure 2.
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Rotate
Copy to a Spline Layer: Selecting this option will copy that polyline to other splines layer. After selecting this option, the Select Layer form will pop up as shown in Figure 3. From the drop-down list, we can select <New Layer> or an available splines layer there.
Break Polyline: Selecting this option will break the polyline into two polylines.
Delete Segment: Selecting this option will remove a segment of the polyline.
Delete Polyline: Selecting this option will remove the polyline.
Delete Grid Elevations:
Interpolate Grid Elevations:
Figure 1 Draw splines procedure.
Figure 2 Polyline Properties form.
Figure 3 Select Layer form.