I'm wondering if there is a way to change the OSX system font size per monitor (e.g. larger for Retina and smaller on external display) ?
I know how to change it system wide (as covered by How can I change the system font size in OS X?), but I would like to do it on a per monitor basis.
Note I am not talking about changing the display's resolution - Macbook Pro Retina running at native resolution.
I understand there some challenges with windows that cross display boundaries, but my thought is the system/tool could use the default for the display that contains the greatest % of the window.