In order to create a new Polyline in the rayCloud:
1. On the Menu bar, click View > rayCloud.
2. On the Menu bar, click rayCloud > New Polyline.
3. On the 3D View, a green point appears beside the mouse. Left click to mark the vertices of the polyline. At each click a vertex is created and the polyline is formed.
4. Right click to add the last vertex and create the polyline.
5. (optional) To complete the drawing adding higher accuracy to the polyline, on the 3D View, select the polyline and correct the position of the vertices: How to edit Objects in the rayCloud.