Reply to Simple question, hard to find

I have now mapped my 2 X1's so 1 will control deck A and 1 will control deck B. To prevent me from mapping everything twice, I've used the Device Target option, so I could simply import the mapping twice and choose the right device target for the right X1.

It would be damn easy to make this four decks if there would only be a "switch device target" button.

Is there such a command or how could this be created with some sort of workaround?