You can have a primary and a secondary Y axis on your charts. I believe that
the option to have a secondary axis is only given when you have two or more
series on your chart.

Select the series you want on the secondary axis and FORMAT - Data Series.
You should see an option for AXIS. Select the secondary axis.

"Dabears70" wrote:

Is it possible to do two alternative scales on the same chart? If so how is
it done?

Thank you in advance for your assistance.
--
Nick