To date, most tabletop systems are designed with only a single application visible and accessible at any time, which is, in many cases, an underuse of the tabletop spacious surface, and counter-intuitive to the normal working environment of a table. Desktop window managers provide users facilities to launch and interact with concurrent applications, as well as manage their work items. However, these managers are designed for single-user systems and cannot be directly utilized in tabletops without sacrificing usability. In our research, we want to bring window manager facilities to tabletops. We approach this by first constructing a conceptual framework based on workplace theories and tabletop investigations to understand how users structure their work in these environments (see Figure 1). We will then use the resulting framework to guide our design of a sample surface manager.