Jon Peltier has two solutions for you at his site:
http://peltiertech.com/Excel/Charts/...l.html#XYArea2
http://peltiertech.com/Excel/Charts/...ll.html#XYArea
Robert Flanagan
http://www.add-ins.com
Productivity add-ins and downloadable books on VB macros for Excel
"txgweedo" <(E-Mail Removed)> wrote in message
news:852C1FD8-0BF3-4C80-918A-(E-Mail Removed)...
> I'm new to XL 07 and I'm trying to add color shading to a specific part of
> the plot area based on the y axis. I've tried adding a new series but XL
> says my line chart is too complex. I'm charting blood sugar levels taking
> at
> different times each day. I want to color the range from 80 to 120 as a
> 'target level' across the chart. Please help if you can!