How does ps change the background color of photos to red?

1. Open the ps on the computer, put in the picture material, and unlock the background layer.

2. Use the main function in ps to complete the matting.

3. Create a new layer and fill it with colors as needed.

4. Finally, adjust the order of layers.

5. According to the above steps, you can change the background color of the photo to red in ps.

Matters needing attention/summary

1. Put a picture to unlock the background layer. 2. The people layer needs to be above the background layer.