This panel is used to replace text within the source data with that specified in order to make on-the-fly changes without having to re-start the import.
Find In Field: This is the mapped database field being searched.
Search For: This is the text being searched.
Replace With: This is the text which will replace the original searched for text within all instances of the specified field.
OK: This button runs the search & replace and refreshes the grid below with changes.