Assign different scales to the value axes

If your graph has a value axis on both sides, you can assign a different set of data to each axis. This causes Illustrator to generate a different scale for each axis. This technique is especially useful when you combine different graph types in the same graph.

Select the Group Selection tool .
Click the legend for the data set you want to assign to the axis.
Without moving the Group Selection tool pointer from the legend, click again. All of the columns grouped with the legend are selected.
Choose Object > Graph > Type, or double-click the graph tool in the Tools panel.
From the Value Axis pop‑up menu, select the axis to which you want to assign the data.
Click OK.

Illustrator

Assign different scales to the value axes

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