How do you display keys a second time

When you register a site the keys are shown on screen.   No other confirmation is ever sent.   How can I re-display the keys?  The 'Manage Sites' option doesn't seem to have any way of re-displaying keys! -- You received this message because you are subscribed to the Google Groups "reCAPTCHA" group. To unsubscribe from this group and stop receiving emails from it, send an email to recaptcha+unsubscribe@googlegroups.com. To post to this group, send email to recaptcha@googlegroups.com. Visit this group at http://bit.ly/1dkFnYd. For more options, visit http://bit.ly/P65DvS.