collaborative editing mode
In regards to your FAQ item 25 which says:
25. How do I lock my shared document for editing after sharing it in 'Read/Write' mode?
A shared document can be locked for editing, provided that it is not being edited by any of the existing shared users. This can be done by clicking on the Lock icon found to the right of 'Participants' folder in the left side panel.
If there are multiple participants editing the document at the same instant (collaborative editing mode), it can be edited in blocks though in a constrained environment.
My question: How does one turn on "collaborative editing mode" to lock down certain blocks?
jdcusi