Adding a Crystal Reports cascading parameter Open the report in Crystal. Create a new parameter. In List of Values, select Value. In Value, select the parameter you want to modify for example, Country. Click the Click here to add item to select a child of the parameter. For example, Region is a child of Country. In Parameters, click the Click to create parameter for the parameter and child. For example, My Parameter - Country and My Parameter - Region. Click OK. Select Report > Select Expert. Click the New tab. Select the parameter. For example, Country. Select is equal to. Select My Parameter - parameter . Where parameter is the parameter you created. For example, My Parameter - Country. Click the New tab. Select is equal to. Select My Parameter - parameter . Where parameter is the child parameter. For example, My Parameter - Region. Click OK and save the report.