Change Mouse preferences on Mac
Use Mouse System Preferences to change how your mouse interacts with your Mac. For example, use gestures to scroll long lists and webpages, and use screen zoom to make onscreen images larger.
To change these preferences, choose Apple menu 
> System Preferences, then click Mouse.
Note: A wireless mouse must be connected with your Mac—or a four-button mouse must be plugged into your Mac—to display the preferences listed below.
Wireless mouse
Point & Click | |||||||||||
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Scroll direction: Natural | Select this option to move the contents of a window in the same direction as your fingers. | ||||||||||
Secondary click | Select the option, then choose “Click on the right side,” or “Click on the left side” to secondary click (or Control-click) items on the screen. | ||||||||||
Smart zoom | Select this option to double-tap with one finger to zoom in or out. | ||||||||||
Tracking speed | Adjust the speed at which the pointer follows the movement of your mouse. | ||||||||||
More Gestures | |||||||||||
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Swipe between pages | Select this option, then choose the gesture to use to move between pages in a document. | ||||||||||
Swipe between full-screen apps | Select this option to move between apps in full screen. | ||||||||||
Mission Control | Select this option to double-tap with two fingers to enter Mission Control. | ||||||||||
Apple four-button mouse
Options | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Scroll direction: Natural | Select this option to move the contents of a window in the same direction as your fingers. | ||||||||||
Tracking speed | Adjust the speed at which the pointer follows the movement of your mouse. | ||||||||||
Scrolling | Adjust how quickly the pointer moves when you scroll. | ||||||||||
Double-Click | Adjust how rapidly you must click for your Mac to recognize a double-click. | ||||||||||
Primary Button | Select this option, then choose this gesture to secondary click (or Control-click) items on the screen. | ||||||||||
Secondary Button | Displays shortcut (contextual) menus—the same as Control-clicking a one-button mouse. | ||||||||||
Mission Control, Show App Windows, Show Desktop, Dashboard, App Switcher, and Spotlight | Press both side buttons at once to activate one of these features. | ||||||||||
Other | Opens an app of your choosing. | ||||||||||
Off | Deactivates the button. | ||||||||||
Scrolling | Choose an option to adjust how the pointer behaves in windows and lists when you scroll. (The scroll ball doesn’t scroll menus or sliders in dialogs.) | ||||||||||