Use the retouching software that comes with Apple's mobile phone, click Edit in the upper right corner of the photo or retouch the photo through retouching software. Retouching is to modify the picture and do some processing and adjustment on the picture, so as to achieve the desired effect. With the improvement of living standards, people's requirements for retouching have also increased. Retouching is to modify and embellish a picture to achieve a perfect effect. Nowadays, professional photography institutions and photo studios need an important procedure.