Many ways to try, including:
Chart menu/ Add data
Chart menu/ Source Data/ Series/ Add
Copy your new series, & paste into the chart (and paste special gives you
the choice of new points or new series, together with various other
options).
--
David Biddulph

"Angela" wrote in message
...
I have a very simple question, I would like to add a second series to an
existing chart, how is it done? (I am comparing accidents in 2006 and
need a
series line for accidents in 2007)

Thank you,