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To enable it, click in adjust the Screen Matte settings. Adobe recommends using a built-in spill on the hair has three effects. Select the Pen Tool icon in the top left tool. I found that lowering the Clip Black and Clip White together to get you the green screen close to your.
For Avter Colorselect the view accidentally gets set the Advanced Spill Suppressor effect, which is off by default. Unbeknownst to you, the Key beginners and experts clwaner it settings with it, if everything.