Hi everybody-

I have created a line chart with 20 weeks of data plotted across the X-axis
(each data point corresponds to the response rates to a direct mail
campaign). I now want to plot two vertical lines showing the start of the
campaign (week 4) and the end of the campaign (week 16).

I know I can manually draw a line, but these charts need to be updated on a
regualr basis, and it will take me hours to manually move the lines on the
100 or so charts I produce. So I want to have someway to specify a start
date and end date, and have the charts update automatically.

Thanks,
JM