As software evolves and becomes more and more complex, program comprehension arises as a major concern in soft- ware projects. The amount of data and the complexity of relationships between the entities are unmanageable for en- gineers without effective tool support. In this paper, we demonstrate how CocoViz1 can help un- derstanding software in a quick and intuitive manner. Some of the implemented approaches have been presented inde- pendently before[1]. However, in CocoViz we combine them in an intuitive and easy to use manner.