What feature allows layers to be combined or manipulated based on visibility?

Blending Modes enable layers to be combined or manipulated based on their visibility and the color information they contain. These modes determine how a layer interacts with the layers beneath it in the timeline stack. By using blending modes, such as "Multiply" or "Screen," you can create various visual effects by changing how the colors of overlapping layers blend together. This functionality allows for creativity in compositing and achieving unique visual results, making it a powerful tool in After Effects for designers and animators looking to enhance their projects visually.

Layer Styles are primarily used for adding effects like shadows and glows to a single layer, Adjustment Layers modify all layers beneath them without altering their visibility directly, and Parenting Layers involves linking one layer to another for hierarchical movement rather than visibility-based manipulation.