Break a PAUSE inside a PARFOR loop

I have a parfor loop that executes two functions. One is an indefinite pause, the other is an infinite loop:

parfor i = 1:2
    if i == 1
        %Start hardware A data acquisition
        pause()
        %Close hardware A data acqusition
    else
        while true %task continues until manually stopped
            
            %USER INPUT BREAK HERE (how?)
            
            %Hardware B data acqusition
        end
    end
end

I want a break function within the second parfor to also break the pause in the first parfor. Is that possible?

Also, how can messages be displayed from within the parfor loop? GUI butons, DISP and FPRINTF don't seem to work.

Obs: "Hardware A" (Tobii Eye Tracker) SDK only collects data during a "pause", so the pause and the parfor are necessary.