The Cart page shows a summary of the items and quantities customers have added to their cart.
Use the theme editor to access theme editor settings for the cart, then add a lock icon to your checkout button, show order notes, and/or show 'continue shopping' button for the Cart page.
Access theme editor settings for the cart
To access the settings for the cart page, go to Customize > Select the cart icon > In the left-side settings, open the Cart page section.
It is worth adding a few items to the cart before making changes to the settings here, as some of the features depend on added items for their display.
Add a lock icon to your checkout button
Give your customers an increased sense of security by enabling Show lock icon on checkout button.
Show order notes
Provide a message field for customers to include more information about their order by activating Enable order notes.
Show 'continue shopping' button
Enabling this setting includes a button on the cart page to encourage the customers to continue shopping. This button will lead back to a collection displaying all products.