letterspacing control

[Kieren MacMillan]

Hello all,

Is there a letterspacing parameter I can adjust?
A search of the archives turned up only questions (and old ones at that).

In my Beethoven template, for example, I'm hacking it like this:

    title = \markup \override #'(word-space . 1) \line { S O N A T E }

But I'd much rather have direct control of the letterspacing.

Thanks,
Kieren.