OS X Yosemite: Mouse & Trackpad pane of Accessibility preferences
Make your mouse and trackpad easier to use. The options available depend on the Mac you’re using.
To open this pane, choose Apple menu > System Preferences, click Accessibility, then click Mouse & Trackpad.
| Enable Mouse Keys | Use the keyboard instead of the mouse to control your Mac. Click Options to customize Mouse Keys: Press the Option key five times to toggle Mouse Keys: Use your keyboard to turn Mouse Keys on and off. Ignore built-in trackpad when Mouse Keys is on: Disable the trackpad on your Mac when you use Mouse Keys. Initial Delay: Set how quickly the pointer starts moving when you press a key. Maximum Speed: Set the maximum speed at which the pointer moves. |
| Double-click speed | Adjust the mouse or trackpad’s reaction time when you double-click an item. |
| Spring-loading delay | Use the slider to specify how long an item has to be over a folder before the folder opens. |
| Ignore built-in trackpad when mouse or wireless trackpad is present | Disable the trackpad on your Mac when you use a mouse or wireless trackpad. If you use a non-Apple mouse, the driver software that came with your mouse may prevent this option from working as expected. For information, see the documentation for your mouse. |
Trackpad options
| Scrolling speed | Adjust the speed at which you scroll through documents and windows using the trackpad. |
| Scrolling | Turn scrolling on or off, and control what happens when you lift your finger from the trackpad: “with inertia:” Scrolling comes to a gradual stop. “without inertia:” Scrolling stops immediately. |
| Enable dragging | Select the checkbox to be able to double-tap an item and drag it without lifting your finger after the second tap. Click the pop-up menu, then choose an option to determine what happens when you lift your finger: “without Drag Lock:” Dragging stops immediately. “with Drag Lock:” Dragging continues, and stops only when you tap the trackpad once. |
Mouse options
| Scrolling speed | Adjust the speed at which you scroll through documents and windows using the mouse. |