Let’s prepare the report template for customization. 
  On the Project Designer toolbar, press Develop to open the project in Visual Studio.
  In the Solution Explorer, double-click on ~\Reports\OrderDetails_report1.rdlc file.
  
  The default report template includes all the fields present in the view. 
  
  Let’s start over with a clean slate. Press Ctrl+A keyboard shortcut to select all elements in the report. Right-click and press Delete.
  
  The report implementation strategy requires either filtering or grouping of data.
              | Strategy | Description | 
             | Simple Filtered Report | This template requires data filtering for accurate presentation of data. It is easier to implement. | 
             | Report with Multi-Level Grouping | This template groups order details first by CustomerID, and then by OrderID. The data does not have to be pre-filtered for accurate presentation. The report customization is more complex. |