The development of complex software systems requires the collaboration and mutual understanding of stakeholders from various backgrounds, which is usually facilitated by joint design of complex graphical models. To support this collaboration, we introduce the concept of a so-called "Augmented Interaction Room" that is equipped with large interactive wall displays, each dedicated to a particular modeling perspective. These models evolve significantly over the project life-cycle as uncertainties are resolved and design decisions are made. Our focus in this paper is to help stakeholders obtain a clearer view of the models' evolution and past design rationales, without incurring significant cognitive effort for navigating a potentially very long and detailed model revision history. For this purpose, we describe mechanisms for storing the history of the continuously evolving models, and methods for temporal navigation that semi-automatically identify particularly relevant past model versions.