Control 4 Decks with 2 rekordbox Vinyls/ Tunrtables

Hi there,

I searched a while but doesn't find any proper info about using all 4 decks in rekordbox dj with only 2 turntables.

For instance, when I would use a DJM-750 (MK2) and DDJ-XP1, can I switch the decks when 1 and/ or 2 already running?

Thanks a lot