Quick Create form different behaviour

Hi Everybody,

I have a question on the quick create form behaviour. I have a form with several sub-grid, the subgrid "Contact" and "opportunity" when push the "plus" sign open a quick create form, the subgrid "child account" or "Equipment" when click on "plus" sign open 1)the search bar and then if i click "new" 2)open a quick create form ( i have enable it from entity and create a new quick create form). The question is how can i make all my subgrid open a quick create form when click + sign??

Thank you so much

Federico