Genexus

Hi. I’m trying to create a KB that features an order system. It’s designed as follows: A customer can place an order, which can contain multiple orderlines. An orderline is an aggregation of a product, and serves to only quantify a given product on an order.

What I’d like to implement is a way to create new orderlines, instead of choosing existing ones, when creating an order.

My problem is that I don’t know how to change what the orderline association button does. Anyone got any tips?