Re: add9 chords

[Noeck]

but the successive adding of thirds is common for such chords.
Now, it is like this:
http://lilypond.org/doc/v2.16/Documentation/notation/chord-mode
9 (number) is adding thirds up to number
.9 (.number) is add this note
^9 (^number) is remove this note
The display and the input syntax are (intentionally) seperated things:
http://lilypond.org/doc/v2.16/Documentation/notation/displaying-chords

What I would propose to add to the LilyPond chordmode (not sure if
clever or possible):
Adding notes without number in front of it:
c:.9  (= what is c:5.9 now)
Removing already works:
c:^3 = c:5^3

Concerning the display, "add" could turned on to be the prefix by
default for such chords (?).

Cheers,
Joram