iface.screen.widthScale=1024;
iface.screen.heightScale=640;
and the Interface.xml with
<Scale x="1024" y="640" />
In my game both are set to 1024x640. While the former seems to influence the HUD scaling, the latter seems to have an impact on scaling of the start up menu, the in game menu and choosers.
However, increasing the scaling in Interface.xml from 640x480 to 1024x640 kept the overall chooser size the same, while the chooser was pushed to the upper left.
Here some comparison screens. Since F4 for screenshots only seems to work in game, but not in a menu (request!!), some shots taken with my phone:

vs

What I request / like to know is how to keep the choser the same size relative to the overall screen, while adding more pixels inside scaling up the interface. The font should then scale accordingly (which it does not right now, see screen).



