This particular background is a difficult one to remove. If we use just the one Chroma Key effect and keep increasing the Similarity setting, we will eventually chip away at the foreground image, superboy, in our attempt to get rid of all the green. (Eventually, if you go high enough, every color in the spectrum is "similar" to green.) Fortunately, there's an easy solution because Premiere Elements lets you apply as many instances of the Chroma Key as you need, each one targeted at a specific color. Once More with the Chroma Key
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