One-page checkout is selectable in the theme editor, but you should be aware that you will not be able to send checkout exit emails. It is best to decide which one to use after taking into account the price of the products you are handling and the period of consideration.
In the case of a one-page checkout, where you can expect to improve your conversion rate, you need to be aware that it will be difficult to send follow-up emails to users who have left the checkout because you will no longer be able to obtain their email address during the checkout process.
