In full text retrieval only the recognised page text is searched. If you turn on this option, all indexed fields are copied to the page text (they are added to the first page of a document). Thus, a full text search returns also hits that stem from keyword attribution and you even do not need to know in which field a specific keyword was entered.
2024-02-28 (c) by Archivista GmbH, CH-8118 Pfaffhausen