I found this question about fonts from June, 2013:
Has changed in the intervening years? There are references to annotation fonts in the RV 3.10.4 release notes, as well as in the Reference Manual for 4.0:
I'm seeing a very similar behavior as described in the previous question (font choices not respected), except my font names don't get wiped after re-saving. Are setting annotation fonts this way supported yet?
Also, our default font doesn't seem to be Luxi Mono as described in the reference, even after installing that font manually.