Theme Craft- How to show only the selected variant and hide the other variants???

[JennyCool]

I have many variables of products (colors and sizes). Can you please let me know how i can only show the selected variant and hide others? 

[JennyCool]

Thank you very much for your respond. But this does not work in the theme Craft. OR maybe i am making something wrong. I clicked this item " Hide other variants'media after selecting a variant". But still shows the other color variants.