there are no buttons. the mac trackpad isn't an emulation of a mouse anymore, you have gestures now. pinch, zoom, etc. you can "click" anywhere on it, just like

there are no buttons. the mac trackpad isn't an emulation of a mouse anymore, you have gestures now. pinch, zoom, etc. you can "click" anywhere on it, just like with a regular trackpad, and you don't need to know much more to use it, but you can do more advanced stuff if you want to (like getting a word definition, preview a page, etc)