I know that Vegas's color corrector tool is actually quite powerful, but one of my problems is that by seperating the colors in the shadows, highlights, and midtones, it's hard to see what the entire picture looks like when entirely shifted. Is there a single-wheel color corrector plugin for Vegas, or a way to "sync" the three wheels together?

You can copy/paste the setting from the wheel you correct to the others. That's pretty quick and painless.

You can also use the color balance plug-in to get a full shift along the three axis. You might also use HSL if you want to shift the hue of the entire image. I use all three tools depending on what I am doing.

Vegas has a single wheel colour corrector.
There's 2 colour correctors in vegas,,,
One called a colour corrector and another called secondary colour corrector.


Paul.