If the other two or three detail tables (other than “notes”) are not enabled with Master/Detail-Add (as Detail), then you may have only one detail table, and it falls back to single detail table so the mulitple detail tables icon is not shown.
If the other two or three detail tables (other than “notes”) are not enabled with Master/Detail-Add (as Detail), then you may have only one detail table, and it falls back to single detail table so the mulitple detail tables icon is not shown.