Here are some common gestures you can use with your Magic Mouse 2.
Turn on/off: Slide the on/off switch on the bottom of the mouse to turn it on (green is visible).
Click: Press the upper surface of the mouse to click or double-click.
Secondary click (that is, right-click): Press the left or right side of the mouse to perform a “secondary click.” (Enable right- and left-click in System Preferences > Mouse > Secondary click.)
360º scroll: Brush one finger along the surface to scroll or pan in any direction.
Screen zoom: Hold down the Control key and scroll with one finger to enlarge items on the screen. (Enable this feature in System Preferences > Accessibility > Zoom > Use scroll gesture with modifier keys to zoom.)
Two-finger swipe: Swipe left or right to move through pages, photos, and more.
Customize your gestures. To set preferences and enable gestures, choose Apple menu > System Preferences (or click the System Preferences icon in the Dock), click Mouse, then click the buttons at the top to see the available options.