Apple Final Cut Express HD - Manual (Page 817)

Chapter 55 Keying, Mattes, and Masks 817
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5 Next, you want to expand the keyed area to include regions of the background that
weren’t immediately eliminated by the first key. Click the Select Color button, and in
the Canvas, Shift-click another region of the background you want to key out to
enlarge the region of transparency.
You can perform this step as many times as you need to. The goal is to eliminate as
much of the background as you can without affecting the foreground subject. If you
start encroaching on the outline of your foreground element, you’ve gone too far and
should undo. It is not necessary to remove all the background fringe around your
foreground subject with this step; you should focus only on eliminating the major areas
of the background screen.
6 You can remove more of the key color from the background and eliminate more
fringing from the foreground layer without affecting the foreground subject by
adjusting the Color Range, Saturation, and Luminance controls.
The top handles adjust the overall range of hue, saturation, or luminance keyed out,
while the bottom handles blur the difference between the range of color that’s keyed
and the range of color that isn’t.
Selecting another range of color
with the eyedropper tool After selecting an additional
range of color