It seems that you can't1234. If you are ok with a squeezed look, set all registry values of Display1_DownScalingSupported to 1 and change the screen resolution to at least 1024x768.

1. Force Windows 8 Metro Apps to run lower resolutions below 1024x768 [↩]
2. Windows 8 Metro style apps running on low screen resolution netbooks [↩]
3. How to enable Windows 8 Metro style apps on an older netbook [↩]
4. Google-Suche [↩]