Hagen - Pragma ADE

100
Features
If you’re lucky your editor will use a font that shows the missing characters (dejavu
monospace is a good candidate).
The replacement characters can help you to locate the spots where something is missing
so that an alternative can be considered. The replacements resemble the category
of the missing character.
name symbol category
placeholder lowercase blue number letter
placeholder lowercase magenta symbol math
placeholder lowercase red letter lowercase
placeholder lowercase yellow symbol other
placeholder mark green mark enclosing
placeholder punctuation cyan punctuation close
placeholder uppercase red letter uppercase
You can call up this legend after loading an extra module:
\usemodule[s][fonts-missing]
\showmissingcharacterslegend
\showmissingcharacters
The last command shows a detailed list of missing characters
filename lmroman10-regular.otf
missing 12
U+00194 Ɣ LATIN CAPITAL LETTER GAMMA
U+00263 ɣ LATIN SMALL LETTER GAMMA
U+002A4 ʤ LATIN SMALL LETTER DEZH DIGRAPH
U+002AD ʭ LATIN LETTER BIDENTAL PERCUSSIVE
U+002AE ʮ LATIN SMALL LETTER TURNED H WITH FISHHOOK
U+003B1 α GREEK SMALL LETTER ALPHA
U+003B2 β GREEK SMALL LETTER BETA
U+003B3 γ GREEK SMALL LETTER GAMMA
U+02153 ⅓ VULGAR FRACTION ONE THIRD
U+02155 ⅕ VULGAR FRACTION ONE FIFTH
U+02159 ⅙ VULGAR FRACTION ONE SIXTH
U+0215B ⅛ VULGAR FRACTION ONE EIGHTH
Here the characters are shown, because we use a monospaced font that happens to have
them. Of course this example uses characters that are rarely used and are unlikely to
show up in future versions of the Latin Modern fonts.
Here a few more relevant trackers will be mentioned.