Next to Revert Checkout Settings, choose a Revert option:
Revert to last published settings - Reverting to the last published settings will overwrite any changes that were made since you last published your Checkout & Registration Manager settings.
Revert to default Checkout & Registration Manager settings - Reverting to the default Checkout & Registration Manager settings will overwrite all edits and customizations (such as custom fields or custom CSS files) and restore the Checkout & Registration Manager to the system default settings.
Click the Revert button.
In the confirmation dialog, click the OK button. You will be taken back to Checkout & Registration Manager.
Return to Store Manager and Publish your Order Settings.