Using the Navigation Window 

A complex business object comprises several subdialogs. The relationship between the subdialogs is shown in the dialog structure. You can go to the subdialogs from the dialog structure.

...

You can navigate in a subdialog as follows:

Go to a subdialog in a hierarchy
The information in the subdialog is usually additional information about the higher-level entries.

                            a.      Select an entry in the current subdialog in the right-hand screen area, for which you want to see the entries in a lower-level subdialog.

                            b.      Choose the lower-level subdialog in the dialog structure, to which you want to go, by double-click.

The system shows the entries of the lower-level subdialog in the right-hand screen area. You can now maintain the subdialog in the right-hand screen area.

Go to a subdialog at the same or a higher level

Choose a subdialog at the same or a higher level in the dialog structure by double-click.

The system shows the entries of the selected subdialog in the right-hand screen area. You can now maintain the subdialog in the right-hand screen area.