A problem with natural controls, like gestures, is that we become accustomed to them so any changes can feel rather odd. This is something that a number of people that upgrade to OS X Lion will soon understand as the trackpad gestures have been changed for the release. Multi-touch gestures play a larger role than ever before and Apple’s promotion of full-screen program usage (sort of tablet-ifying the OS) will further increase their prominence.Some of the gestures are customizable so if you find a motion you don’t like you may be able to change it, but you will always be able to disable it or learn the key commands. To make changes you just need to go to the Apple logo (top left) > System Preferences > TrackPad. The last two tabs–Scroll & Zoom and More Gestures–are where the customization is done. Apple has inserted handy videos so you can figure out what rotating with two fingers looks like.AdChoices广告Foremost, people will want to change the Scroll Direction setting. If you want a page/document to move down when you drag two fingers from top to bottom then you should uncheck this setting. If you want what Apple calls “natural” scroll direction–which acts as if you were physically dragging the page up or down with your fingers–then leave the box checked. The natural setting might make logical sense, but it will feel weird to people accustomed to trackpad-based gestures as opposed to tablet-based ones.Big changes happened with the four-finger gestures too. With Lion a four-finger swipe down will no longer show your desktop, rather it will show all open windows. Swipe down with four digits and nothing will happen (it used to trigger Expose). The new controls are a pinch with the thumb and three fingers for LaunchPad and a expansion of the same to show the desktop. Using the gesture preference menus these commands can be disable but not customized.Additional customization of gestures would be nice to see within the OS, but there are add-ons that can solve this problem, like MagicPrefs and BetterTouchTool. Those apps will have to do for now as Apple is focused on people learning the gestures and actually using them. A (somewhat) standardized system of gestures will be incredibly useful as touch interfaces becomes more prevalent.