How to adjust the focal length of Apple mobile phone photography?

Iphone comes with powerful camera and video functions. If you need to adjust the shooting distance in the new iphone to achieve the best effect, just use the holding gesture.

First, after taking pictures, slide on the screen with any two-finger gesture in the preview box.

Then an adjustment slider will appear. Drag the slider or click the buttons on both sides to adjust the focal length at the beginning of the red coil.