With current functionality, you have to build an advanced search in order to apply 'find primary code only' when creating coding sheet searches. Not every user is comfortable building codes table searches in the advanced area (plus they'd need to know the codes behind the scenes that apply to that coding sheet level).

It would be very useful if when adding a coding sheet filter to a search there was a checkbox for 'Primary Code only' so you knew only primary codes would be returned in your results without having to go advanced.