Zoom: Zoom is a built-in screen magnifier that works wherever you are in iOS. And it works with all apps from the App Store. Turn Zoom on for full-screen or picture-in-picture view, allowing you to see the zoomed area in a separate window while keeping the rest of the screen at its native size. You can adjust the magnification between 100 and 1500 percent and access multiple filter options in either view.
Zoom is a built-in screen magnifier that works wherever you are in iOS. Here is how to use it:
- Launch the Settings app from your Home screen > Tap on General > Tap on Accessibility > Tap Zoom under the Vision section > Tap the switch to turn on Zoom.
Once you’ve got Zoom enabled, you can use it on the fly. Here’s how to use it:
- Double tap with three fingers anywhere on the screen to enable and disable zoom. You can do this from pretty much anywhere.
- Drag three fingers around the screen to pan around and move to another area of the screen.
- Use one or two fingers to scroll in the particular section that is on the screen.
- Tap and hold the anchor to drag the magnifying glass up and down the screen.
Source: https://www.razmobility.com/ios-built-in-accessibility/#learn-more