To form a deep understanding of the present; we need to ?nd and engage history. We present an informal history capture and retrieval mechanism for collaborative, early-stage information design. This history system is implemented in the context of the Designers' Outpost, a wall-scale, tangible interface for collaborative web site design. The interface elements in this history system are designed to be ?uid and comfortable for early-phase design. As demonstrated by an informal lab study with six professional designers, this history system enhances the design process itself, and provides new opportunities for reasoning about the design of complex artifacts

Informal, sketch-based design tools closely match the work practices of user interface designers. Current tools, however, are limited in the size and complexity of interaction that can be specified. We have created an advanced sketch-based visual language that allows for easy prototyping of large, complex interactive designs. In its current embodiment in the denim web design tool, the visual language allows designers to sketch reusable components for recurring page elements, such as navigation bars, as well as conditionals to illustrate and test transitions that depend on a user's input. Designers can also specify sites that accept richer user input than simple clicking. Our informal evaluation shows that these features allow designers with little programming experience to quickly create prototypes of large, complex web sites while still working inside an informal, sketch-based environment

Modeling is important in object-oriented software development. Although a number of Computer Aided Software Engineering (CASE) tools are available, and even though some are technically advanced, few developers use them. This paper describes our attempt to examine the requirements needed to provide tool support for the development process, and describes and evaluates a tool, Knight, which has been developed based on these requirements. The tool is based on a direct, whiteboard-like interaction achieved using gesture input on a large electronic whiteboard. So far the evaluations have been successful and the tool shows the potential of greatly enhancing current support for object-oriented modeling.