Dual Finger Stretch

Validation level: 5. CHI, UIST, CSCW and TOCHI paper publication

It allows the user to adaptively scale a portion of the screen with the second finger while the primary finger performs the selection.

Copy Bibtex Benko, H.; Wilson, A. D and Baudisch, P. Precise selection techniques for multi-touch screens. In Proceedings of the SIGCHI conference on Human Factors in computing systems, pages 1263-1272, 2006.
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Storyboard of Functions

To allow for simultaneous “stretching” and selection, the primary finger (right) provides the initial anchor location around which the user interface is scaled, while the secondary finger (left) identifies the corner of the square area which will be scaled. Lifting the secondary finger from the table resets the interface with its default un-stretched state.