Your iPhone has a few hidden features available that can give you some additional functionality. One of these hidden features is a magnifier that you can use to look at small objects, or at objects that are far away.
The magnifier can be accessed by quickly pressing the Home button three times. However, this assumes that the Magnifier setting is enabled on the device. if you press the Home button three times and nothing happens, then our guide below will show you how to turn on the Magnifier feature on your iPhone.
How to Turn On the iPhone’s Magnifier
The steps in this article were performed on an iPhone 7 Plus in iOS 12.2.
Step 1: Open the Settings app.

Step 2: Choose the General option.

Step 3: Select Accessibility.

Step 4: Touch the Magnifier option.

Step 5: Tap the button to the right of Magnifier to enable it.

Now you should be able to press the Home button three times to bring up the magnifier tool. You can drag the slider to the right to zoom in on an object.
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