Wondering why it took you this long to figure that out? Having two monitors for CAD is like trying to eat soup with a fork, sure you can do it but you look silly doing it. Honestly my neck hurt just watching people swivel back and forth between screens all day long. One big screen means everything is right there in front of your face where it should be. Plus you stop looking like a bobblehead at your desk every time you check a drawing. Enjoy the single screen life, your chiropractor is gonna miss that paycheck though.