I've recently reset up my computer and made pushed my main monitor to the left monitor as to allow me to better see my desktop backgrounds the way they were intended to be seen.
I launched Arma only to find out that I have no ability to tell the client which monitor to play off of as it plays off the windows " Main Monitor".
It doesn't make any sense that the "Fix" is to force me to change which monitor is main. No other games have this problem...