How to put n small red flag icons on the map captured on PS?

1. Open the PS software first, then open the picture to be processed in PS, and then press the shortcut key "Ctrl+j" to copy.

2. Next, select "Select"-"Color Range" in the toolbar above, use the eyedropper tool to absorb the white part, and click "OK".

3. Then press "Delete" to delete.

4. Next, open the map picture you need in PS, drag the flag out of it and put it in the map, and press "Ctrl+t" to adjust the size and position according to your own needs.

5. Finally, hold down the "AIT" key, drag on the red flag, and copy multiple identical small red flags.