SFr682k

Just took a look on the sources. `Focus`’ implementation is completely different from `metropolis`’ (for example, while `metropolis`’ is building frames the ‘elegant’ way using `beamer` environments like `beamercolorbox`, `Focus`...

> It seems to work with the actual beamer template instead of the template parent You're right: it _does_ work when used with actual beamer templates instead of parent templates....

Actually, the rationale is stated in `beamerthemeexamplebase.tex`: > The strange way of typesetting math is to minimize font usage in order to keep the file sizes of the examples small.

> Oh, and I forgot to say that XeLaTeX support would be a plus, but I can live with LuaLaTeX if that’s what I get. ;) `multimedia` already supports LuaLaTeX...