In the old days (Pocket PC, Windows Mobile) it was possible to use CTRL+Z on the soft keyboard just like on a full keyboard.
Now in Windows Phone, with no CTRL key, is there a way to "undo" a typing mistake? For full blown Office documents in Word or OneNote it's all too easy to overwrite quite a large chunk of text by mistake.
What can I do at that "aaaaaaaargh" moment?