Step by step how to use a pedal with rotary organsw

[alecberfield]

I have a Privia PX3 Limited Edition and am really and truly NOT very technical.

 

I would like to plug in a pedal (of some kind, momentary or otherwise???) to activate and deactivae rotarys while playing live.

 

I'm guessing you must set up each pre-set to accept the pedal but I don't know what kind, where to plug it in since I'm using a sustain pedal in the damper plug-in and from time to time a volume pedal from stereo outs. 

 

I really need the idiots step by step instructions. 

 

What kind of pedal

Where to plug it in

How to assign my organs to the pedal so I can change rotary on/off functions and anything else I should know, like how to enhance rotary swirls and so forth.

 

I would also like to know if I set up a pedal for this will it effect anything else in the keyboard. In other words, will this make blanket changes or can I select rotary on/off for my stage playing menu of 8 sounds? 3 of which are organs. 1 of which doesn't have rotary.