You may need to use something like Rob Bovey's XY Chart Labeler.

http://www.appspro.com/Utilities/ChartLabeler.htm

"Darryl" wrote:

Greetings,
I am running Excel 2000. I have created a chart. It contains multiple
series. The chart type is
100% stacked column. When I select an individual data point, or for that
matter a series, and
click format data point / series, the data label tab does not have the "show
percent" enabled. It is
greyed out an non-selectable.

How do I show the % in the stack pieces ?

thanks,
Darryl