-This is an optional setting that allows you to specify an alternative field to be displayed in the extra (third) column if there is no data for the field specified in extra_column for a particular item. The numerical codes for the fields are the same as above. Please note that the data shown where the alternative field has been used will NOT be marked differently in any way from the rest of the extra column. There is no default.
+This is an optional setting that allows you to specify an alternative field to be displayed in the extra (third) column if there is no data for the field specified in extra_column for a particular item. The strings for the fields are the same as above. Please note that the data shown where the alternative field has been used will NOT be marked differently in any way from the rest of the extra column. There is no default.