Thank you for your answer. Do you know the priority of the features? Will be they implemented during next month, 3 months or next year? If it's more than a few months, can we help you to implement it, I've reviewed sdkjs code of the word editor (I need this feature in this part) and I see that it contains some stubs for partial locking, I believe for co-editing purposes in the future. But same approach I believe can be used for partial document locking (which is editing restriction by nature).