To make your Product Builder arrow headers theme responsive, please follow these steps:
- From Shopify's admin, select Apps.
- Select Product Builder.
- Select Edit Product next to the builder you want to make responsive.
- Under "Select a default theme", select Arrow Headers.
- Select Customize Selected Theme.
- Under "Customize Theme CSS", find the line: /* Shappify Inc - Product Builder App Styles - theme 3 */
- Copy and paste the Responsive Arrow Headers CSS below this line.
- Select Save.