how to use "set representative" function in "Configurable product"

Hello,

I use "set representative"  function to a module variant in a "configurate module";

And Creo created a "Representative Module Variant"  representation in the "configurate module" file;

But my configurate product is nothing changed, 

Is there any function can let onfigurate product use the "Representative Module Variant" representation automatically ?

Thank you！