No digital tool has yet to replace the speed and flexibility of a pencil and a piece of paper or a marker and a whiteboard. Those, plus the talent and wisdom of the designer, are the true tools of the trade. Before designers spend time fiddling with any of the software described here, they should spend some time thinking and planning with pencil and paper or on a whiteboard. Before they use computers to straighten their lines and make everything presentable, designers should rough out what is going to be made. In short, they should design the design. To make the documents described in this chapter, interaction designers need a working knowledge of several programs in addition to a word processing program:
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