This tutorial will show you how to set up columns (layouts) in PrestaShop 1.7.x.
Open Admin panel > Design > Theme & Logo.
Click Choose layouts button at the right side.
Select a page and change its layout up to your needs.
Save changes by clicking on the Save button.
Look through the wide range of high-rated PrestaShop templates if you need more!
Feel free to check the detailed video tutorial below: