If it an OOP language I use a tool to reverse the code into UML class diagrams. There are a few of these tools, I use Enterprise Architect. I play with the resu

If it an OOP language I use a tool to reverse the code into UML class diagrams. There are a few of these tools, I use Enterprise Architect. I play with the resulting rat’s nest and I find that tactile exercise necessary to gain an understanding of the relationships between classes. It also serves as a road map for the future