You can open in windowed mode.
Anyway, the point is, if you scale font down, you get absolutely nothing. the widgets remain all the same. They cover the same area. A button remain the same size, but the writing, which is smaller on the button. You don't save space. Unless if you see two writings:
Various skills
Various skills
you read the first faster
Anyway, in the end, font scalling <100% can't have negative effects on the layout. Or at least i can't think of one.