Re: turn off accidental cancellation

[Rune Zedeler]

Steve Grazzini wrote:
> By default Lily provides the cancellation -- so this e-flat gets a
> natural (to cancel the e-sharp in the signature) and then the flat.
>
>   \key fis \major
>   ees
>
> Is there a property that controls this behavior?

Yes.
Reading the documentation of the accidental engraver:

http://lilypond.org/doc/v2.0/Documentation/user/out-www/lilypond-internals/Accidental_engraver.html

You notice the property "extraNatural" which is exactly what you are looking 
for.

  \property Score.extraNatural = ##f

-Rune