diff --git a/TODO b/TODO
index 8632971..732ec3a 100644
--- a/TODO
+++ b/TODO
@@ -3,6 +3,7 @@ option to break ligatures
 compress div/span states
 
 multiple charcode mapped to a same glyph
+re-encoded only used glyphs
 
 take care of spaces (simulate by <span>)
 use absolute positioning for long whitespace