Change Layer dialog box
Timeline panel – shortcut menu – Change Layer
You can transfer an animation from the selected layer to another layer, removing it from the selected layer.
Select new layer
Click the drop-down list button and all the layers inserted in the current document are displayed. Select a layer to which you want to associate the selected sprite. The previous layer will no longer be associated with the sprite.
Change Layer becomes deactivated when several objects (layers) inserted in the Timeline window are overlapped.