The materials we need to prepare are: computer, PS.

1. First, we open the image to be processed, and then use the drag tool in ps to drag the image to the newly created blank layer.

2. Then we press and hold "ctrlT", and a few small squares will appear on the edge of the photo. Click on the small squares on both sides of the mouse, pull to the left and right, and lengthen the picture.

3. Then click the left mouse button on the hook in the upper right corner to save.