To begin we will use the RNC pull down menu to set the view to a Top View. At this point we can draw in the viewer the path on which we wish to have the fence cross-section.
Open draw_lines' user interface. If you have setup everything correctly, a yellow message which says
"Drawing in Top View Mode - Use Alt+Left Mouse Button to draw."
should appear at the top of the window. If not, choose RNC->Top View in the Viewer's window as directed in the end of the last topic.
To draw in the viewer we use the ALT Left mouse button. Begin by pressing the "New Line" button. Then with your cursor near the left edge of the outline of the model created by the external edges module. while holding down the ALT key draw using your left mouse button from the left side of the model towards the right side of the model.
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