Deck Selection

how do i select deck 3 and 4? I cant seem to get it on those decks. All the songs i selected only plays on the first 2 decks. Sorry, newbie here.

Here it is:

Just click on the icon showing 4 bars which is located in the top right.
There is a disc icon for the default turntable view, a 2 channel waveform mode, a 4 channel waveform mode and video mixer (screen icon).

hope that helps. cheers, rokr