When I set up Google Authenticator (so far on 3 exchanges) I wrote down the keys in a notebook, then scanned the code to set it up.  I never printed out the bar code with the key, just wrote the keys down in my notebook.  Is there a way I can go back and print out the bar code with the key so if I need to do a recovery I can just scan the bar code instead of manually entering that long key into Google Authenticator?  Thanks