Final answer:
In the Field Extractor Utility, selected-fields shows the chosen fields, non-matches show events that don't match the criteria, matches are events that do, and non-extractions are fields not extracted.
Step-by-step explanation:
In the Field Extractor Utility, each button has a unique function. A) Selected-fields button shows what fields have been chosen for extraction. B) Non-matches are events that don't match the specified extraction criteria. C) Matches button shows events that do correspond with the extraction criteria. Finally, D) Non-extractions button shows fields that have not been extracted.
Learn more about Field Extractor Utility