How to Zoom With a MacBook Pro Trackpad (3 Steps)

Use two fingers to touch the trackpad. The MacBook Pro trackpad makes manipulating documents and applications easy, but three fingers and four fingers have other functions. To zoom in, you need only two fingers.
Zoom in on the current document by pinching outward on the trackpad with the either two fingers, or your thumb and forefinger. Zoom back out by pinching inward.
Modify your trackpad preferences if you find the trackpad too sensitive to your touch or not sensitive enough. Select 'System Preferences,' and then select 'Trackpad' from the Hardware options. Click the 'Point & Click' tab to modify the speed of response to your hand movements. Select 'Scroll & Zoom' to disable the zoom feature.
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