1. Open PS and import a picture with a red handprint. You can also take a red handprint with your mobile phone and send it to your computer.

2. Use the rectangular box selection tool to select the part of the red handprint, and then click Select-Color Range on the menu bar.

3. In the pop-up dialog box, use the straw tool to absorb the color of the red handprint, then adjust the tolerance value to make the red handprint clearer, and click OK.

4. At this time, the red handprint is selected. Press Ctrl+J to copy a layer, then close the small eyes of the original layer, and you can see that the red handprint has been dug up.

5. Then, open the picture you want to see, drag the red handprint layer onto this picture, adjust the position and size with the mobile tool, and put the red handprint in the appropriate position.

6. Finally, change the mixing mode of the red handprint layer to positive superposition, and it can be completed.