How to add the quantity input option next to option

How to add the quantity input option next to option

Can you be more specific on what you're trying to do? We have a feature called ADD QUANTITY and ADD OPTIONS on the products you add on any Payment Processor. If that's what you're referring to, just follow the guide I'm linking below.

Complete guide: How-to-Add-Options-to-Payment-Forms

In case we misunderstood your question, just get back to us with a bit more info and a clearer description of what you're trying to do so we can better assist you.