Dave I had a feeling that description was maybe not to clear
1 Select the pencil
2 mouse click once to start the line
3 move the mouse to draw the line and mouse click to end the line
At this point the tool has ended the line but also started a new line at the same point. So if I kept going a few more clicks and moves I'd have 1 line with many segemnts
Unless I hit the escape key I cant move the pencil to start a new line at a new starting position.