I'm not sure, but this is how I would test it.
Open the document as normal. Then, immediately, goto File > Save As and save the document file either under another name, or in a different location, (eg the Desktop is a good temporary location).
Then with the copy still open and the original safe, test what you want to do. If things go wrong or not as you expect then at least you still have the original document file to work with and this copy can be deleted or you can continue to test on it.
I hope that helps.
Hi. I'm editing a very long document with many footnotes. When I delete sections of text, will the footnotes delete automatically or do I need to remove each one separately? Thanks!