In an organisation that has multiple recording studios It is common to prepare the structure in advance, send it to a studio and after the recording someone does a quality check on the end product.
One of those checks is very evident: checking if the structure of the book is intact.

Hindenburg ABC has already a difference between a reading mode and edit mode on the manuscript but we believe we could gain more security if you could activate an overall lock on the entire manuscript. For example with a menu option, or with a lock button on the manuscript titlebar.

This might help additionally against accidental damage to the textstructure made by someone else before recording.