The document discusses editing a main image by using the Clone Stamp tool in Photoshop to remove distracting plants in the background that were hanging down and taking attention away from the characters in the foreground. The Clone Stamp tool works by copying an area of the image and brushing it over another part to cover it, such as erasing a plant behind a character's shoulder by copying the wall behind it. This results in a smoother edited image where the removed plants can no longer be seen when zoomed out.