[b]To produce a finite straight line continuously in a straight line.[br][br][/b]Basically, if you have a line, you can extend that line forever. Either it has points on the line already in which case you can just extend them or you can pick points on the line yourself and extend the line that way.

Using the applet below and the tools provided, extend the two lines provided with the [icon]/images/ggb/toolbar/mode_join.png[/icon] tool. [br][br]