Re: Background Colour

[Lukas-Fabian Moser]

Hi Jean,

> How about a separate grob with engraver? Try the attached.

This should be included in the documentation as a textbook example for a 
not-quite-trivial, but reasonably straightforward example of a both a 
custom engraver and a custom grob. Thanks very much for this!

And wouldn't it be worth to add the convenience macro define-grob! to 
LilyPond's stock scheme library?

Lukas