Define Metaphors Clearly

Metaphors in text connect new concepts to existing domains of user knowledge. Likewise, "system metaphors" (e.g., desktop, control panel, game, book) help users understand the functional aspects of a new environment: how to proceed and how to interpret the results of one's interactions. Remember the basics: Don't mix metaphors. Don't use metaphors that are inappropriate to the content. Define metaphors clearly, making their boundaries explicit. If a metaphor requires detailed explanation, or complex labeling, then it probably isn't working. A successful system metaphor should provide a framework for system use, not explanations of every system feature.