Vignette is a quick Tool effect to add the classic outer "burn" to a Composition. This effect is great to pull viewer attention further into an animation, or change the tone of a scene.
Setup
Select an Active Composition
Click Vignette
Effect Controls
On the first level of the Vignette control, the Effect can be Enabled/Disabled and the Shape can be toggled between an Ellipse or a Circle.
Properties
Some general properties can help shape the Vignette appearance; adjust the Feather, Position, Scale and Intensity to increase the contrast of the Vignette to the Composition.
After Effects