I installed Windows 7 on my Macbook Pro with retina display. Is there any way of making a resolution smaller than 2880 x 1800 fill the whole screen? For any resolution I select, it is displayed at actual size, so letter boxing occurs, rather than being upscaled. I know I can change the DPI to make text and some things larger, but I would rather just have a scaled up version of another resolution. Is there any way to fix this?