Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
There are certain gestures that enable their corresponding function, but i'm not sure you as a user can choose which gesture will enable certain features. I'd look around Trackpad settings as @guzhogi suggested or "System Preferences -> Accessibility"
 
Can’t you change it in System Preferences > Trackpad?
No, I can't. I want the effect of double finger dragging and three finger scrolling, there's no option in system settings. Are there some commands to achieve it?
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.