Store Checkout Template item allows you to customize the appearance of the "Store Checkout" page.
You can configure the "Spacing" feature for your form.
!Real data of the form will be displayed when the website is viewed.
In the Design settings tab, you can change the text styles for each font level.
Also, in the Design tab, you can change the shape and button presets, so you can change the size, color, font depending on the applied preset.
Checkout template form fields are added and configured in Settings > Forms Settings
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 an existing one on this page.