Hi,

Use a dummy series to draw the line.
http://www.andypope.info/charts/averageline.htm

Cheers
Andy

On 24/02/2010 01:10, QB wrote:
How would I go about adding a horizontal line to a chart.

I am trying to make a line chart and need to place a horizontal line at 80%
across the entire chart. How can I do this?

QB

--

Andy Pope, Microsoft MVP - Excel
http://www.andypope.info