



Whereas the rest of the document remains safe, no un-authorize editing will be allowed. Which he or she can re-write and modify for you. And would like to have an opinion from your friend about a certain portion of the document contents only. This feature could be handy if, for example, you have a thesis or some sensitive documents. The selected portion of the document will be highlighted with a Blue color (you probably already know that if you do a lot of copy-pasting).
