Secondary Color Correction Primer - The Art and Technique of Digital Color Correction - page 189

In Color, go to a secondary and enable it and enable the vignette. Then
draw an oval that goes from edge to edge and almost from top to bottom
( Figure 5.36 ).
You can soften this circle by either center-dragging (center-dragging
on many mice is the scroll wheel) in the circle or by changing the softness
in the vignette control area ( Figure 5.37 ) .
Once you have at least a starting point for the shape and softness, you
can choose the Control pulldown at the upper right of the secondary tab
near the HSL controls and specify whether you want to correct either the
inside or outside of the vignette. You can choose to do both inside and
outside corrections if you want to. I actually chose to lower the gain and
midtones outside of the oval and bring up the chroma a bit inside the oval.
This is the image with a pretty strong vignette ( Figure 5.38 ). We'll be
seeing example of vignettes in the color corrections that our panel of col-
orists executes in the coming chapters as well. I made this vignette pretty
bold to emphasize what I was trying to do, but most of the vignettes that
you'll see later in the topic are much more subtle. These vignettes are
very hard to show in print unless they're fairly obvious, which is the
opposite thing that most colorists are trying to accomplish with vignettes.
Instead of a very broad oval that covers a lot of the image, you could also
aim the center of the vignette to the focal point of the image. In the follow-
ing image, the correction remains the same as above, but the oval is centered
Fig. 5.36
Fig. 5.37