Store Checkout Template item allows you to customize the appearance of the "Store Checkout" page.
The grey area indicates the position of your form on the Store Checkout page.
You can configure "Spacing" feature for your form.
!Real data of the form will be displayed when the website is viewed.
By default, the Store Checkout Page on preview looks something like this. The client is able to checkout as a guest, checkout with a new account or with existing one on this page.