Thanks it works. But then I just realize that I can edit the chart directly by clicking it. So I can first enable the line name marker option - this put the name of that line on each turning point of the line, next I can click and press delete on any unwanted marker, finally I will get a line graph with the name of each line at its end point just like Andy Pope's trick. I just wonder what is the advantage of Andy trick, which is more complicated?