Traditional Way Pinch-in Pinch-out by two fingersNew Proposal Zoom in and out only by one finger or two fingersAdvantages Zoom In & Out by one hand Zoom In & Out only by touch penWhen or for whom ? do you need ? For the people who are disabled in one hand When you use touch pen while wearing gloves When you have to use only one hand ex.) When you hold a baggage in one hand When you hold a strap in a bus or metro.Zoom in and out 1 To zoom in, drag from center to the edge To zoom out, drag from the edge to the centerZoom in and out 2 ( Same result by Pinch-in Pinch-out ) After first touch on specific point, then drag from the status of 2nd touch within a certain time. To zoom in, drag the opposite direction from the 1st touch, to zoom out, drag to the same direction from the 1st touch.Zoom in 3 After 1st touch, then touch 2 times in a row to the point diagonally, need to be expandedYouTube Link : http://www.youtube.com/watch?v=5Zmn3l_x5N0&feature;=youtu.be