Hi,
You will need to create your own custom gridline for a specific value.
http://peltiertech.com/Excel/Charts/AddLine.html
Cheers
Andy
--
Andy Pope, Microsoft MVP - Excel
http://www.andypope.info
"jbigelow" wrote in message
...
I want to add a gridline on a chart that shows a custom value, but I can't
figure out how to do it. Any help would be appreciated. Thanks.