Tektronix Grass Valley 3000 - Manual (Page 160)

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Section 4— Switcher Operations
Background and Matte Generator Operations
Use the Background and Matte Generator controls to create a
number of interesting mattes to serve as effects backgrounds or
fills. The following topics are covered in this subsection:
■ Matte selection
■ User Defined Wash
■ Matte and Texture Menus
■ Super Black
■ Secondary Wipe Wash