tman: Can't you just change what cells it uses for each axis in the series tab? Right click the graph, select Source Data and then Series. There should be a field for X values and a field for Y values.

Excellent. That does exactly the right thing. Thanks.

PhilipOHare: Using your control key, highlight column you want for x, release control key. Then highlight y, release control key - click on the graph button and there ya go!

Doesn't work. At least not in Office XP.
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-- roger