Which view mode in Adobe After Effects allows control over acceleration and deceleration for custom easing?

The Graph Editor is the correct answer because it provides a visual representation of keyframes and their associated properties, allowing for detailed adjustments to timing and motion through the manipulation of curves. In the Graph Editor, users can create custom easing by dragging the keyframes’ handles, which affects how an animation accelerates and decelerates. This allows for more fluid and nuanced motion than what is typically achievable through standard easing presets.

Through the Graph Editor, users can see the velocity of the animation expressed in a graph format, enabling them to finely tune the motion dynamics of layers. This capability is essential in professional motion design, where subtle variations in timing can have a significant impact on the overall feel of the animation.