By default, the Zen Cart checkout process is a three page checkout:
- choose shipping details
- choose payment details
- confirm order
Once checkout has been confirmed, a success page is shown.
Screenshots of those pages are provided in the Storefront Checkout pages FAQ.
One Page Checkout
Via a plugin, Zen Cart also offers One Page Checkout. Some storeowners find this a more friendly experience for their customers. The One Page checkout screen looks like this:
Successful completion of one page checkout also redirects to the standard Zen Cart checkout success page shown here.
Many more details on One Page Checkout are provided in the Github Repo for OPC.