Use this task to the display subscribable report while you are editing it. Enter any report parameters required in the dialog box.
To display a report preview
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In the Manager, select the Report Subscriptions > Subscribable reports category. 
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Select the report in the result list. 
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Select the Change main data task. 
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Select the Report preview task. 
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Enter the report parameter value in the dialog box and confirm with OK. NOTE: The dialog window is only shown if required for displaying report parameters for this report. 
