Do you want to have a different layout, colour or size for your booking button for your storefront?
You can do this easily by overriding the CSS class:
Please note, you will need a basic understanding of CSS and editing your theme files in Shopify. If you are uncertain of how to proceed, we highly recommend hiring a Shopify Expert to do it for you.
You can easily achieve that with the Shopify Online Store 2.0 themes!
Find more information: Setting up Sesami for the Shopify Online Store 2.0