How to group lines in line graph?

[ritikaSharma]

There are 3 students. I made a graph of their score in 2010 and 2011. Now I wanna circle their performance and write it's for 2010 and 2011.
I have seen such marking in several places.
Is there any option to make such circle in graph in MS Excel?
Please check the example of my graph. I used line draw to make it.
http://i53.tinypic.com/2nuu9hh.jp…
or
[url]http://tinypic.com/r/2nuu9hh/7[/url]

Also, how can I remove the 'series 4', 'series 5' and 'series 6' in the legend.

 

[PCRIDE]

THere may be a way using VB to create the circles but I am not certain. What i have done in the past is create a secondary axis and created a few helpers cells that give me 1 or 0 to make a mark.

You may need to create a second chart to create a point where you want it circled. You could use a custom PNG file as a circle possibly to highlight that area based on the reason it would be circled. Put the chart behind it or create a secondary axis.