With "Honey Upsell & Cross-sell" you get the opportunity to set up buttons classes or ID.
Here is the guide on how to do it:
- Log into your Shopify account;
- Chose "Apps" section:
- Locate "Honey Upsell & Cross-sell" in the list and click on it.
- Hover over it and choose "Settings":
- Click on the tabs which named according to the buttons or just scroll down to these sections: