Parameters are useful when you want to add interactivity and flexibility to a report, or to experiment with what-if scenarios. Suppose you are unsure which fields to include in your view or which layout would work best for your viewers. You can incorporate parameters into your view to let viewers choose how they want to look at the data.
•You can use parameters in calculations and calculated fields that are used in the view.
•You can display the parameter control in the view for users to select parameters.
•You can reference parameters in parameter actions.
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