5 - pref: MaxItemsToProcessForBatchMod
7 - items in a single item modification batch.
10 - pref: MaxItemsToDisplayForBatchDel
12 - items in a single item deletion batch.
15 - Limit the number of creator images stored in the database to
21 - "Show the author for news items:"
22 - pref: NewsAuthorDisplay
26 staff: "Staff client only"
27 both: "Both OPAC and staff client"
31 - Automatically delete temporary uploads older than
32 - pref: UploadPurgeTemporaryFilesDays
34 - "days in cleanup_database cron job. NOTE: If you leave this field empty (zero), the cron job will not delete any files."