In PrestaShop, you can make the product description display in full width by modifying the template files in your theme. Here’s one way to do it:
Log in to the back office of your PrestaShop store.
Navigate to the “Design” tab, then click on “Themes”
Click on the “Configure” button next to your active theme.
Look for the “product. tpl” file located in the “templates” folder.
Open the “product. tpl” file in a code editor and look for the section of the code that controls the layout of the product description. It should be a div element with a class of “product-description”.
You can remove or change the class or add a custom class to control the width of the product description section.
Save the changes in the file.
Clear the cache of your store to see the changes.
Please note that these instructions are a general guide, as the exact process may vary depending on the theme you are using. If you are not familiar with editing template files, it is recommended that you make a backup of the file before making any changes, or seek the assistance of a developer.
Also, you can use the CSS to change the width of the product description. By adding a custom CSS class to the product description element in the product.tpl, you can control the width of the product description section and make it full width