Using match on iPad + re analyze tracks in iOS

 I believe I was asked if I wanted to upgrade to add two decks players on my iPad app, I did that and I think I was able to match two tracks together and plan at the same time.  I think this is on my iPad app and not on my desk top computer I just can't remember how to access that view of two playing decks. How can I find this function on the iOS version of rekordbox? 

 Also I have about 300 tracks on the iPad that I'm using at the moment they are all analyze but the key detection is not listed I want to really analyze all three tracks at once how can I do this without doing them individually?