TreeGrid supports also simple master / detail relation between trees.
A row in master grid can have set its attribute
Detail
to id of detail grid where the rows children will be displayed.
It is possible to display the row's children in the detail grid only, in the master grid only, or in both grids. It is controlled by DetailOn Cfg attribute of master grid.
In this relation there is no copying values by CopyTo, the structure of all the grids should be the same, the rows are displayed in one or more grids.
It is possible to moving rows between grids or inside one grid or copy rows inside grid or add or delete rows in any grid.