I have a document which I deleted most of the content from in order to use it as the starting point for a new edition. Somehow this was Saved, overwriting the original, as well as being being saved with a new name using Save As in the normal way. By the time I discovered the almost empty original file, some two weeks later, my backups had also been overwritten.
However - it seems likely that the original content is still in the file, if only I could access it somehow. The file is 18,396 KB, but if I Save As with a new name, the resulting file is just 1,904 KB. Looks like more than 16 MB of 'deleted' stuff is still there in the original.
So obviously the question is, can I somehow Undo back to a point before I closed the file?
You would indeed think so, because of the fact that changes are not 'applied' throughout a document but rather appended to the end, and all an Undo has to do is lop off the latest changes one by one. However, that only is true for the "working" version of a file, and as soon as you close it, this metaphorical ledger gets closed as well.
If you have a PDF of that older version, you could copy the text out of it.
I was hoping, of course, that there might be a 'hack' of some kind which might make it possible.
I do have a PDF, and all the contents as external files of one kind or another, so I can rebuild the document. It could have been a lot worse!
Now is the time to create a template for this project so it never happens again. The template has the added advantage that you don't keep adding to the accumulating errors that may not be enough to bring down the file in the last iteration, but will do so someday an hour before it needs to go to press.
Recycling one version to the next is a bad workflow....