sticking the product to left side of screen while scrolling on desktop on debutify theme

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As you know, in debutify theme, as default, when you start scrolling down the product description in the product 

the product pictures and buttons stay in the top of the page and you find a really really ugly gap, a big galaxy of space on the left of the screen 












i want a way to stick the item with the pictures and the buttons to stick with the user's left part of the screen instead of staying in top 

and leaving the endless gap there.