Select the series that you want placed on the 2nd
x-axis, and choose the Format | Selected Data Series...
menu command. Select the "Secondary axis" radio
button on the "Axis" tab.
?that only gives me a second y axis
Now what am I doing wrong?
Yep...however, upon further review...
I think I have the correct answer. A secondary
x-axis is only supported for the XY (Scatter) chart
type. Using the Chart | Source Data... menu command
you can specify separate X-axis values for each
series. Then using the Chart | Chart Options...
menu command you can activate the display of the
secondary x-axis scale on the Axes tab.
Boy, made me work, but that was fun!!! : )