When you want to prepare a detailed list, use "List Details by Filter" option in "General" window. In that case, for the information that will be listed in detail, "Detail Query" window will be opened in report wizard. By following the steps below you can reach the window.
As it is seen, STLINE table is stated in detail to list the slip lines also in the report that the inventory slips will be listed. After that, "Detail / Report Query Relations" window is opened for the reference relation between STLINE (keeps inventory lines) and STFICHE (detail fields and slip table).