I have already search and try differents helps but still doesn't work.
As you can see below (first picture), my product description is not on the center of the page but the right.
In the second picture I show you the codes of the page, what are the modifications to do ?
Thanks so much !!
You are looking into the wrong file, it's under the Sections folder file named product-template.liquid
I just implemented this solution and it works fine!