The Matrix View is used to display relationships between instances of two classes. The row instances, which are shown in the first column, are subjects and the column instances, which are shown in the first row, are objects of the relationships shown. The rows and columns can be swapped to switch subjects and objects. Double-clicking on an instance globally selects it. Multiple Matrix views can be opened.
You can drag the subject instances to be used in other views of TopBraid Composer like Basket View.