The Field List window 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 in the Main Menu, by selecting View | Windows | Field List.