Adding Star/color rating through CDJ?

I can't figure out how to add a star/color rating to a track while playing live through the CDJ 3000. For example, a track I select and is currently playing that has no star rating that I am really liking or dislike, how do I add star ratings through the CDJ that will also be changed in RB when I sync back up (In my case I use a laptop with an external HD with Rekordbox on it but made this point to state I understand RB will need to recognize the change). Kind of like setting a hot cue on the fly