Multiple Monitors On Win 8.1 - Scaling individual displays

I have a Microsoft Surface Pro 3 hooked up to a Targus Usb3 dock that drives 2 external HP 1920x1200 monitors. I'm also driving a wall-mounted 42" 1080p Vizio through the Surface's Hdmi connector.

If I let Win 8.1 decide what the scaling of each monitor should be, I end up with the following resolutions, which are great except for my 42" Vizio, which I'd like to run at 1920x1080:

Surface Screen=1440x960
HP#1=1920x1200
HP#2=1920x1200
Vizio=1280x720

I've fooled around with different settings in control panel and can get all of the monitors to run in their native resolution (by selecting one scaling level for all my displays, smallest) but then the Surface's screen, running in it's high-resolution mode, is too small to work with.

Is there a registry tweak to set the scaling for a specific monitor or will I have to wait for the next version of Windows?
ou81aswellAsked:
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Davis McCarnOwnerCommented:
This article is about setting different scaling for multiple monitors on a Surface Pro 3:
http://blogs.msdn.com/b/danchar/archive/2014/11/01/high-dpi-multi-mon-with-surface-pro-3-dpi-scaling-tweaks.aspx

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ou81aswellAuthor Commented:
The article mentions that "Windows 8.1 does not expose an interface to the user to choose different dpi per monitor (perhaps in future OS?)" but it does suggest a method that involves downloading an Intel "3261" display driver and then setting the built-in display to a custom resolution of half res (1080x720).

That seems too involved given it's not that big a deal and hopefully it will be addressed in the next version of Windows as the author finished by saying the "Hopefully with the next Windows 10 update these hacks won't be required at all".
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Displays / Monitors

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