How to key out a color in final cut pro

Graph: Provides two options to set how the adjustable graphs in the Chroma and Luma controls are used to fine-tune a key:

• Scrub Boxes: Select to limit the Chroma and Luma controls to adjusting softness (edge transparency) in the matte you’re creating.

  In this mode, you can’t manually adjust tolerance (core transparency), which is determined by the Green Screen Keyer effect’s automatic sampling, plus any Sample Color rectangles you’ve added in the viewer. (To increase matte tolerance, add more Sample Color rectangles or adjust the Strength slider.)

• Manual: Select to use the Chroma and Luma controls to adjust the softness (edge transparency) and tolerance (core transparency) in the matte you’re creating.

  Make sure the Strength slider is set to a value greater than 0% before you switch to Manual mode; otherwise the Chroma and Luma controls are disabled. When you switch to Manual mode, the Refine Key tools and Strength slider become disabled, but samples you’ve made with those controls continue to contribute to t

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