Open the photo video interface, click "video material", and then click "Add"; After selecting the video material, slide the toolbar to the left, and then click "Long Legs"; Open the settings dialog box, hold down the white slider and drag it to the right. Pay attention. The more you drag to the right, the longer the legs in the video. Click the "Play" button to preview after stretching the leg to an appropriate length, and save the preview leg after stretching the leg to an appropriate length.