When cataloging, the tag editors are invaluable tools. However, it is possible to enter the fields manually. And if you can enter e.g. the 008 field manually, it is muck easier to make errors. In 008 you can enter more than 40 characters or add letters or numbers in the wrong place. I would like to have the possibility to lock these tag manager fields. - When locked, the field could only be edited by using the tag manager. - When open, you could also add characters manually.