2 ways - neither of them vey informative or user friendly
File > Data - Details button (only shows the GRUP types changed, - you can delete the whole grup if you like but thats all you can do with it)
Or in the Object Window of the CK , any edited or new item will have an * by the Count number
Unfortunately there is no way that i am aware of to apply a filter and just show the changed items in the Object Window (unless a naming convention was used)