I find myself erroneously hitting Command-Delete instead of Option-Delete occasionally (like in these forums), which deletes a line of text, but I don't seem to be able to undo that action. Undo doesn't work, Redo doesn't work. Is there a way to undo the deletion? Thanks. P.S. okay, now it's working intermittently. I can CMD-Del the "Thanks." line and CMD-Z to get it back, but when I type "P.S." and CMD-Del it, CMD-Z just backspaces up to the end of the Thanks line.