Is there a way to get a list of all encoding/family/series/shape combinations that are actually used in a document that you have the sources of? You know, like the
OT1/fvm/m/n strings you get when a particular font is missing.
This is important when you want to change to a commercial font and need to know what weights and variants you actually need to buy. Like: "Do I actually need the demi-bold small caps italics?"
And since many font changes are not done by hand with
\emphs and whatnot, things can easily get a little confusing in a longer document.