If you would like to change the number of columns that display on your store, there are four different grid settings: 1) the homepage, 2) the category and product grid pages, 3) the widget pages and search results, and 4) the vendor pages.
 

To change the number of columns on the homepage:

  • In the admin panel, hover over the Site Content tab and click on Manage Homepage.
  • Beneath the Display options you will see Homepage Grid Columns and a drop-down.
  • After you choose a number from the drop-down, click Publish.
To change the number of columns for your categories and products:
  • In the admin panel, hover over the Inventory tab and click on Manage Categories.