CATIA's "Instantiation from Selection" is a very useful command when it comes to streamlining your design process. By selecting existing geometry or components, you can effortlessly create new instances with just a few clicks. This not only saves time but also ensures consistency across your designs. On top of that, Power Copies are a fantastic way to encapsulate design intent and reuse it efficiently. But you can take it a step further with parametrization, by defining parameters within your Power Copy, unlocking the ability to adjust dimensions and features, providing flexibility and scalability to your designs.