Good straight line. Here are a couple techniques you could use:

http://pubs.logicalexpressions.com/P...cle.asp?ID=590
http://peltiertech.com/Excel/Charts/XYAreaChart2.html

- Jon
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Jon Peltier, Microsoft Excel MVP
Peltier Technical Services
Tutorials and Custom Solutions
http://PeltierTech.com/
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"Buster" wrote in message
...
I wish to color a region of an Excel graph between two, defined, straight
lines. The coloring should not obscure graph curves and points between
the
straight lines. Is it possible?