I want to show in <lightning output field> default values when there is no value in record field

I want to show in <lightning output field> default values when there is no value in record field

I have a problem related to 'save and new' button in lightning interface i.e when I edit a record and click 'save and new' button on the popup it doesn't pre-fill the lookup values. I can't update it as it is a standard popup and is outside my component. So is there a way to override the 'save and new' button or hide it from the edit record popup please help!!!