The master roll over tool won't let you view past years rollover settings. It would be great to have at least a view only option and to be able to set the "to school year" setting to the past. Either that or a place where the rollovers are logged. Currently the only way is to set the current year to the past, but that means you have to warn everybody of the change and unintentional damage could be done (and obviously it would be a problem to do during the school year.