# ⌂ Arrow notation and transposition for quarter tones

If you use arrow notation for quarter tones, and distinguish a raised natural from a lowered sharp, you can define extra note-names to enter notes with these distinct alterations.

You list all the pitch-changes that your notation distinguishes, and then choose what symbols to use for each pitch pitch-change. Transposition uses your defined pitches: `\transpose bes, c \music` takes the difference between your pitch `bes` and your pitch `c` and shifts every pitch in `\music` by that amount. If the resulting pitches have an alteration with an entry in the `glyph-name-alist`, that symbol is printed. A missing entry generates a warning. You can put as many alterations in `glyph-name-alist` as you like.