Hi Martin
The only way I could find to add a second axis to a chart is to select a
data series within the chart and then selecting another chart style to plot
that particular data series in. Then, in the Formatting Palette, look in the
Chart Options pane in the Axes section, the Secondary Vertical/Horizontal
Axis buttons will be enabled.
I could not discover how to enable the second axis while keeping the same
chart style. Hopefully someone with more Excel and chart expertise will be
able to help.
-June
OfficeArt Tester, MacBU
Microsoft