Grass Valley 1200 Operation Manual - Manual (Page 88)

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Section 3 — Controls & Menus
Chroma Key Menus
Press the [Chroma Key] top menu button to display the Chroma
Key top-level menu shown in Figure 3-17. This menu provides
control of chroma keys for any of the switcher’s three keyers.
Chroma Key Menu Functions:
[AUTO SETUP] —Turns on chroma key Auto Setup mode. This
mode automatically creates a chroma key when you select the
chroma key background color. To select this color, position the
monitor cursor over the desired color in the background scene
and press the button on the top of the joystick.
[SHOW KEY] —Enables or disables Show Key mode. When on, this
mode fills the chroma key foreground with a white matte over a
black matte background. This makes edges and foreground
transparency more visible for fine adjustment.
[SUPPRESS LEVEL] —Selects background chroma or luma for
suppression level adjustment.
(BACKGROUND LUMA SUPPRESS LEVEL) —Adjusts the level of
luminance suppression applied to the chroma key
background scene.
(BACKGROUND CHROMA SUPPRESS LEVEL) —Adjusts the level
of chroma suppression applied to the chroma key
background scene. Chroma suppression cancels out
unwanted color in the background. Normally this control
should be set at about 50%.
[FGND SUPPR>] —Displays the Foreground Suppress menu.
[KEY EDGE>] —Displays the Key Edge menu.
[SHADOW PROC>] —Displays the Shadow Proc menu.
[FORCE MASK>] —Displays the Force Mask menu.