For creating a new SVG element, see svg.html.
Select an SVG element, click to add a new polyline to the SVG element.
A new polyline appears inside the SVG element:
You may move the polyline to a desired location, change width and color. For details of these operations, see svg_polygon.html.
A polyline is defined by its corner points. You may expand "points" and modify these values:
You may visually set these points by clicking on desired locations on the web page. For details, see svg_polygon.html on visually setting vertex points.
You may specify hyperlink target and destination, and create highlighting effects. For details, see svg_polygon.html.