Use dualview with one monitor for different font sizes

I have a NVIDIA GTX 660 TI and an Asus PB278 display. I would like to use dualview, using two outputs on the same graphics card--DVI and Displayport--both cabled to the same display, in order to run the SINGLE monitor at two different font sizes from the two connections. I can get it to work in that I can set up dualview, switch the monitor source inputs, and see output on both, but I can't make the font sizes (or resolution, for that matter) different across the two views. Reason I want to do this is the display looks best and measures correctly with a custom font size of 113% instead of the standard font size of 96dpi, but many of the programs I run, even some of the latest like GPUTweak, don't display text fields properly with anything other than the standard font size.

I suspect that the problem may have to do with this one monitor identifying itself as the same monitor to the NVIDIA code, but who knows?

Any ideas? Thanks, DaveD