Hi cristina-9899,
Thanks for reaching to us.
Sorry, but there is no option in Theme Settings available for that. Checkout is default WooCommerce functionality and WoodMart does not control it. For specialized assistance and potential solutions, I kindly suggest that you reach out directly to the author plugin’s support team https://wordpress.org/support/plugin/tabby-checkout/, who are better equipped to provide you with the guidance you requires or You need to find a third party plugin to achieve more functionality that best suits you.
Regards,