Currently it prints unicode blocks, which in the case of fonts with alternates accessed with opentype features does not print all of the glyphs, unless they are assigned to the private use area.
Extra glyphs could be printed in a separate page after unicode, or there could be a mode to print glyphs in the order they are in the font, or some other order entirely.
Personally I'm interested primarily in the features added recently to JuniusX: cv16 and cv13, also in ss15 (various shapes of e caudata) used also in Junicode.
Currently it prints unicode blocks, which in the case of fonts with alternates accessed with opentype features does not print all of the glyphs, unless they are assigned to the private use area.
Extra glyphs could be printed in a separate page after unicode, or there could be a mode to print glyphs in the order they are in the font, or some other order entirely.