This rather obscure option only applies to dialogs that were forced to use the Windows desktop font size grid because of the radio button options at the top of the dialog. (In other words, dialogs that were designed to use that grid will not be affected.) The option is probably only useful as a visualization tool, to be used temporarily, when considering the choice to migrate from the traditional main window grid to the newer Windows desktop grid. Since the height of dialogs created using the desktop font size grid does not include the caption (title bar) height, switching from the traditional grid to the desktop font size grid has the effect of making your dialogs taller, which initially makes them look "funny". Although the real solution is to adjust the internal layout of the dialog, this option can be a useful expedient.
