AJA kona3 Installation And Operation Manual page 64

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Downstream Keyer Mode:
Downstream Keyer Off — when this pulldown menu item is selected the downstream
keyer will be turned off
Frame Buffer over Matte— places the keyed video with alpha channel currently in the
Frame Buffer over a fixed color matte determined by the "Matte Color" setting set
separately.
Frame Buffer over Video In—places the keyed video currently in the Frame Buffer over
the video input for playout or print-to-tape.
Graphic over Matte—places a graphics file having an alpha channel (chosen in "Graphic
File" pulldown) over a fixed color matte determined by the "Matte Color" setting set
separately.
Graphic over Video In—places a graphics file having an alpha channel (chosen in
"Graphic File" pulldown) over the video input for playout or print-to-tape.
Graphic over Frame Buffer—places a graphics file having an alpha channel (chosen in
"Graphic File" pulldown) over the current contents of the KONA card's Frame Buffer
(which might be from storage, video In, Kona TV, etc.).
Matte Color: only available when the pulldown "Frame Buffer over Matte" or "Graphic over
Matte" are selected-pressing this button brings up a color selection dialog. The dialog
provides a variety of ways to select a matte color including a color wheel, color picker
(choose from a location anywhere on the computer screen), numeric sliders, swatches,
"crayons", and spectrums. The matte chosen will be used as a video background under
the keyed video.
KONA 3 Control Panel, DS Keyer Screen, Matte Color Selection
Foreground pre-multiplied (checkbox): use to avoid "matte lines" and improve the
appearance of the foreground (key) being composited over the background.
Click Matte Color
Button to Bring Up
Color Selection
Dialog