Last I checked (somewhat less than ten years ago), it did do things with DPI. Note that if you were using it with a sorry distro-packaged version it might have

Last I checked (somewhat less than ten years ago), it did do things with DPI. Note that if you were using it with a sorry distro-packaged version it might have been broken because proper DPI support requires a patched X11 dummy video driver or something along those lines, and if you had an unpatched one DPI stuff didn't work.