I have a surface pro 3 and I'm using it connected to an external display using BOTH displays. The external display is a 21:9 aspect ratio display, using as main display, then using the surface screen for messaging/phone and pandora, other misc smaller window items. I cannot for the life of me get the size of the screens right. If i get everything looking right (resolution, text size etc) on the external display then everything is TINY and barely able to read things on the surface screen. If I get everything right on the surface screen then everything on the main screen is HUGE and it completely eats up my screen space. Tried MS support, they were useless, thought I'd see if anyone here has figured this out? Thanks!