Dear Dany,
The Drill Down window appears displaying the transaction rows for the
selected 'Measure'. You can add more data item selections to the report,
like you do in a report in Report Composer (drag and drop into the
report view area), to view additional information about the underlying
transaction rows.
For columns of other data type, eg. 'Dimension', please right click on
it and choose 'Display More Attributes'.
Regards,
Saurabh Thukral
SAP Business One Forum Team