I need to plot a secondary axis on a chart. MS instructions for plotting
secondary series listed below. The problem is there isn't a "Selected Data
Series" on the Format menu. I am using XP, how do I get this?

When the range of values for different data series in a 2-D chart varies
widely, or when you have mixed types of data (such as price and volume), you
can plot one or more data series on a secondary value (y) axis. The scale of
the secondary axis reflects the values for the associated series.

Click the data series you want to plot along a secondary value axis.
On the Format menu, click Selected Data Series, and then click the Axis tab.
Click Secondary axis.