The details shared here apply to the most recent versions of our themes. To keep your theme up to date, check out this helpful document.
To change the text on the "Add to Cart" button to read "Buy Now" or any other phrase of your choice you can modify your theme's language file.
Step 1: Open the language file by following these steps.
Step 2: In the "Filter translations" field, type "Add to Cart" (or, if you've already changed this to say something else or are using a language other than English, type whatever text is currently appearing on your "add to cart" buttons):
Step 3: Locate the "Add to cart" field under the "Products / Product" header:
Step 4: Change the text currently in that field (by default it will be "Add to Cart") to whatever you'd like!
It's important to note that changing this value will change it on all product pages and quick view windows. If you only want to change the wording of the "add to cart" button on some products, this requires custom development with a Shopify developer.
Alternatively, if you would like to keep your "Add to cart" button, and instead enable the "Buy it Now" button to display as well, you can follow these instructions for Shopify's dynamic checkout buttons.