Grass Valley Maestro Master Control v.2.4.0 - Manual (Page 294)

MAESTRO — User Manual 290
Visualization Tool
The left panel also has tools for creating or modifying the alpha channel
and softening the edges of the alpha channel (also softens the inserted key
effect).
Figure 178. Visualization Tool - Still Image Editing Tools and Preview Windows
Previewing an Image
The image Preview windows show the original image (on top), the alpha
channel (bottom left), and a simulated keyed image (bottom right), which
is the result of combining the original image and the alpha channel over the
selected Background color (
Figure 178 ).
Preview
Window
Preview Windows
Preview
Window
Left
Panel