Field List
The Field List panel serves the following purposes:
- Displays the list of all available data fields (attributes you can show in your report) and allows you to create report elements that will show information from these fields.
 - Allows you to create calculated fields by building expressions based on the values of data fields, report parameter values, etc.
 - Shows existing report parameters, and allows you to add parameters to your report.
 
                                            
                                        
If the Field List is hidden, you can enable it by selecting Windows > Field List on the ribbon.