Featurerequest: Extend documentation on -nofontswap

I want to minimize the probability that a matlab generated pdf could render differently on another computer or with different pdf readers.

Does font swapping mean the substitution of fonts, if the system does not know the specific font name?
Or are the fonts embedded differently?
Does a pdf which was generated with the `-nofontswap` look more often the same on different devices?

It would be nice, if you could add a note on the consequences in the documentation. Thank you. JS