setLayerExpression
Define or remove JavaScript expressions for specific layer properties in After Effects compositions, enabling dynamic control over properties like Position, Scale, Rotation, and Opacity.
Instructions
Set or remove an expression for a specific layer property.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| compIndex | Yes | 1-based index of the target composition in the project panel. | |
| expressionString | Yes | The JavaScript expression string. Provide an empty string ("") to remove the expression. | |
| layerIndex | Yes | 1-based index of the target layer within the composition. | |
| propertyName | Yes | Name of the property to apply the expression to (e.g., 'Position', 'Scale', 'Rotation', 'Opacity'). |