For creating a new SVG element, see svg.html.
Select an SVG element, click to add a new line to the SVG element.
A new line appears inside the SVG element:
You may move the rectangle to a desired location, change width and color. For details of these operations, see svg_polygon.html.
A line is defined by its two end points point1 and point2. You may expand "line" and modify these values:
You may visually specify point1 and point2 by clicking on desired locations. 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.