Is there a switch to enable it thank you!
It is a 'Property' of the Layer.
Click on the Layout required, switch to the Layers and select the Layer. In the 'Properties' window on the far left is an option called 'Use render cells'.
Make sure to have read Ashley's bog so you understand when and how to use this feature: https://www.scirra.com/blog/ashley/14/how-render-cells-work