1, first open the PS software, and then open the picture to be trimmed in PS.

2. Then press the shortcut key "Ctrl+j" to copy the background layer, and the next operation will be carried out on the copied layer.

3. Then select "Pen Tool" in the toolbar on the left to select the area to be whitened. Take the face as an example to feather two pixels.

4. Next, click "New Layer" in the lower right corner and press Alt+delete to fill in white.

5. Then choose the blending mode as "Soft Light" and set the opacity to an appropriate parameter, and it is finished. The following is completed.