Customizing for Drilldown Reports 
You carry out G/L account information system Customizing in the General Ledger Accounting IMG.
Here you can make the following settings.
To find out how to make the above mentioned settings, see the documentation for each activity in the G/L Accounting Implementation Guide.
Specific examples of creating forms and reports can be found in
Appendix: Sample Reports for General Ledger Account Information System.