Vfx decks 3 and 4 ?

[FileSpnr]

Does the shift function allow me to control these decks with the Vfx controller?

or do I need a 2nd controller for them?

[djegun]

The 'shift + push media' on the Vfx Control allows you to switch between the control of the players 1/2 and 3/4.
You must be in 4 players mode [Options > Number of players >4].