Syntax: list of fields ordered by desired weight
These fields will be searched by the user's text query. Fields listed higher will be weighted higher in search results, according to the Position in Text search setting. Additional Fields may be selected, if they are to be searched by the user's text query. Note that changing Additional Fields' names, types or order later may affect their presence in Index Fields.
Note that changing these fields will cause indexes to be rebuilt, which may take several minutes or more for large-data profiles. The old setting will be used until the index rebuild is complete.