Digital zoom on mobile devices
These steps explain how to enable and use digital zoom features on iOS and Android mobile devices. These are operating system features that can be used together with the mobile apps in order to digitally zoom.
iOS (iPhone/iPad/iPod Touch)
Settings > General > Accessibility > Zoom then select
Double-tap with three fingers: zoom.
Drag with three fingers: pan.
Double-tap with three fingers and drag: change zoom.
Settings > My Device > Accessibility > Vision > Magnification Gestures then select
Triple-tap (Single tap three times in a row rapidly): zoom.
Drag with two or more fingers: pan.
Pinch (place two fingers on the screen and move them closer or farther apart): change zoom.