In its latest support for touch input, Microsoft unveils a set of gesture commands and associated hardware designed to make it easier to get around Windows 8 with a mouse.
If you are already using Microsoft's Touch Mouse, introduced for Windows 7 in 2011, the new Windows 8 gestures should feel somewhat familiar; however, there are a few changes that may take some getting used to.
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Microsoft Gets Touchy With Mouse Gestures for Windows 8 | PCWorld