About matrix map
The Matrix Map view lets you visualize network traffic, displaying the nodes around an elongated ellipse. The node weight shows the relative volume of its traffic. The different line colour make the activities connected more obvious. The Matrix Map view contains its own tools to control the display of nodes and types of network traffic.
There are some options about Matrix Map, such as kinds of colours, and you can change them in Options Dialog (as shown in Options of Matrix Map).