The Second Y Axis option allows you to display a selected chart series along a second Y-axis, with different scaling. The scaling is performed automatically according to your selection.
To display a second Y-axis for a member:
Open the chart member menu in the legend, and select Second Y axis.
A second Y-axis displays on the right of the chart, and the selected series is automatically scaled. You can add more series to the second Y-axis or move them back to the first Y-axis.
To remove the second Y-axis, select Fist Y axis from the chart member menu.