Keying - Nuke 101: Professional Compositing and Visual Effects - page 305

Youcanseebytheyellowlinethat'smovingaboutthatthegreenscreensitssome-
wherearound2.5onthehue,orXaxis.Thegirl'shairsitssomewherearound1.5,
by the way.
You are now going to edit the curve in the graph by moving some of the points
that are already there. You can do it by hand, but I'll start you off by typing num-
bers instead.
5. View the alpha channel.
6. In the Curve List window, click the Amount curve so you only see that curve in
the graph ( FIGURE 7.8 ) .
Figure 7.8. Clicking a curve in the list selects only that curve.