Notepad++ can undo after the file is saved to disk. This is very useful. However, there are times when you don’t want it to undo pass a certain point. It would be nice if there is a command to tell Notepad++ to its undo log… or is there already one?
You could do “File” menu -> “Reload from Disk” – this will provide a point from which there is no further undo-ing.