When mixing fonts in XeTeX, some fonts have quite different aspects for the same size.
Say, I'm using Linux Libertine as my main font and I want to use Latino Elongated for chapter headings. Latino Elongated is quite smaller than Linux Libertine for the same font size (11pt).
Is there a way to specify the default font size when loading a font via
\newfontfamily, such that all text written using that font is scaled up?