Hi Line 6!

I have used the Spider III series in the past at my band's place and loved all the features like saving channels.

My question is, If I get a Spider IV 15 Watt amp and FBV MkII Express controller, does the controller change the channels when plugged in?

What I mean is, if i'm on the 3rd channel which I think is called Metal if I click the D on the pedal will it bring me to the 4th channel Insane?

Can you like customize which letter goes with what channel or is channel switching not how this thing works?

Thanks,

Jordan