Structuring of reports by using the report container is a pure Designer feature. Therefore, there is no difference from the "normal” list as shown in section Simple List
For using sub tables, it is required that parent and child data are relationally linked. So, the first step is to design a table element for the parent table in the report container. The next step will be to add a sub element with the child data by the toolbar in the "Objects" window.
At print time the corresponding child sub report will be automatically added for each record of the parent table. For example, the List & Label Sample Application demonstrates this under Design > Reports > Sub reports and relations.
