What should a Data Analyst do to configure the size of marks in a dual axis chart?

To configure the size of marks in a dual axis chart effectively, the Data Analyst should duplicate the measure and configure the second Marks card. This approach allows separate control over the properties of each axis, including the size of the marks.

When a measure is duplicated for the dual axis, you create a second Marks card that can be customized independently from the first. This customization includes options for size, color, shape, and more. By adjusting the size specifically on this second Marks card, the Data Analyst can ensure that the marks corresponding to the second measure are displayed appropriately in relation to the first measure, maintaining clarity and enhancing visual representation.

This method is particularly useful in a dual axis chart, as it often involves comparing two different datasets or measures, which might require distinct visual representations to convey insights effectively. Other approaches, like adjusting the axis scale or using the same measure for both axes, do not offer the same level of control and can lead to misinterpretation of the data displayed.