Magic Lens
Magic Lens&trade filters are a user interface tool that combine an arbitrarily-shaped region with an operator that changes the view of objects viewed through that region.
Showing a modified view of the selected region of interest while leaving the rest of the visualization unchanged, these tools extend the metaphor of a magnifying glass to include any sort of useful visual transformation of application data. They can be used to help the user understand various types of information, from text documents to scientific visualizations.
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